398 results on '"Chapman MD"'
Search Results
2. Exploring the relationship between language, postoperative pain, and opioid useAJOG Global Reports at a Glance
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Rachel A. Levy, MD, Allison H. Kay, MD, Nancy Hills, PhD, Lee-may Chen, MD, and Jocelyn S. Chapman, MD
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bias ,disparity ,equity ,gynecologic oncology ,interpreter ,language barrier ,Gynecology and obstetrics ,RG1-991 - Abstract
BACKGROUND: Racial and ethnic disparities in pain management are well documented. Differences in pain assessment and management by language have not been studied in the postoperative setting in gynecologic surgery. OBJECTIVE: This study aimed to investigate the association between language and immediate postoperative pain management by comparing pain assessments and perioperative opioid use in non-English speakers and English speakers. STUDY DESIGN: This was a retrospective cohort study comparing perioperative outcomes between non–English-speaking patients and English-speaking patients who had undergone a gynecologic oncology open surgery between July 2012 and December 2020. The primary language was extracted from the electronic medical record. Opioid use is expressed in oral morphine equivalents. Proportions are compared using chi-square tests, and mean values are compared using 2-sample t tests. Although interpreter services are widely available in our institution, the use of interpreters for any given inpatient-provider interaction is not documented. RESULTS: Between 2012 and 2020, 1203 gynecologic oncology patients underwent open surgery, of whom 181 (15.1%) were non-English speakers and 1018 (84.9%) were English speakers. There was no difference between the 2 cohorts concerning body mass index, surgical risk score, or preoperative opioid use. Compared with the English-speaking group, the non–English-speaking group was younger (57 vs 54 years old, respectively; P
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- 2024
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3. Cutaneous breast cancer of unknown primary
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Iman Salem, MD, MS, Raven Bennett, BA, Emma L. Hodson, MS, Gabrielle E. Duprat, MD, Hayden Doughty, BSc, Natalia Georgantzoglou, MD, Konstantinos Linos, MD, Mary D. Chamberlin, MD, and M. Shane Chapman, MD, MBA
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breast carcinoma ,ectopic tissue ,metastasis ,next-generation sequencing ,unknown primary ,Dermatology ,RL1-803 - Published
- 2023
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4. Inhaled Volatiles for Status Asthmaticus, Epilepsy, and Difficult Sedation in Adult ICU and PICU: A Systematic Review
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Kevin Gorsky, MD, Sean Cuninghame, MD, Kesikan Jayaraj, RN, Marat Slessarev, MD, PhD, FRCPC, Conall Francoeur, MD, Davinia E. Withington, BM, FRCA, MRCP(UK), Jennifer Chen, Brian H. Cuthbertson, MBBS, PhD, Claudio Martin, MD, Martin Chapman, MD, FRCPC, Saptharishi Lalgudi Ganesan, MBBS, MD, DM, FACNS, Nicole McKinnon, MD, PhD, Angela Jerath, MD, MSc, FANZCA, FRCPC, on behalf of the SAVE-ICU Study Investigators, Martin Chapman, Damon Scales, Julie Nardi, Beth Linseman, Phil Lau, Boris Yakubov, Eily Shaw, Francois Carrier, Emmanuel Charbonney, Michaël Chassé, Martin Girard, Antoine Halwagi, Guillaume Plourde, Han Ting Wang, Frédérick D’Aragon, Maxime Tissot-Therrien, François Lamontagne, Dominique Bérard, Yiorgos Alexandros Cavayas, Martin Albert, Francis Bernard, Karim Serri, David Williamson, Virginie Williams, Patricia Martinez Barrios, Sabrina Araujo De Franca, Etienne J. Couture, Adreanne Côté, Mathieu Simon, Pierre-Alexis Lépine, Dave Gleeton, John Basmaji, Marat Slessarev, Ahmed Hegazy, Tracey Bentall, Eileen Campbell, Michelle Stephens, Tim Winterburn, Roupen Hatzakorzian, Kosar Khwaja, Peter Goldberg, Jason Shahin, Jeremy Richard Grushka, Jonathan Hooper, Sherissa Microys, Hilary Meggison, David Leilipovitz, Jessica Haines, Irene Watpool, Rebecca Porteous, Stephanie Dunster, Sylvie Bourbonnais, Ewan Goligher, Lorenzo Del Sorbo, Niall Ferguson, Philip Graham, Michael Long, Tina Yan, Denise Morris, Maria Kobylecky, Hesham Abdelhady, Tina Romagnuolo, Bourke Tillman, Ian Randall, Elizabeth Wilcox, Michael Jacka, Oleksa Rewa, Vincent Lau, Sean Bagshaw, and Nadia Baig
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Medical emergencies. Critical care. Intensive care. First aid ,RC86-88.9 - Abstract
OBJECTIVES:. Inhaled volatile anesthetics support management of status asthmaticus (SA), status epilepticus (SE), and difficult sedation (DS). This study aimed to evaluate the effectiveness, safety, and feasibility of using inhaled anesthetics for SA, SE, and DS in adult ICU and PICU patients. DATA SOURCES:. MEDLINE, Cochrane Central Register of Controlled Trials, and Embase. STUDY SELECTION:. Primary literature search that reported the use of inhaled anesthetics in ventilated patients with SA, SE, and DS from 1970 to 2021. DATA EXTRACTION:. Study data points were extracted by two authors independently. Quality assessment was performed using the Joanna Briggs Institute appraisal tool for case studies/series, Newcastle criteria for cohort/case–control studies, and risk-of-bias framework for clinical trials. DATA SYNTHESIS:. Primary outcome was volatile efficacy in improving predefined clinical or physiologic endpoints. Secondary outcomes were adverse events and delivery logistics. From 4281 screened studies, the number of included studies/patients across diagnoses and patient groups were: SA (adult: 38/121, pediatric: 28/142), SE (adult: 18/37, pediatric: 5/10), and DS (adult: 21/355, pediatric: 10/90). Quality of evidence was low, consisting mainly of case reports and series. Clinical and physiologic improvement was seen within 1–2 hours of initiating volatiles, with variable efficacy across diagnoses and patient groups: SA (adult: 89–95%, pediatric: 80–97%), SE (adults: 54–100%, pediatric: 60–100%), and DS (adults: 60–90%, pediatric: 62–90%). Most common adverse events were cardiovascular, that is, hypotension and arrhythmias. Inhaled sedatives were commonly delivered using anesthesia machines for SA/SE and miniature vaporizers for DS. Few (10%) of studies reported required non-ICU personnel, and only 16% had ICU volatile delivery protocol. CONCLUSIONS:. Volatile anesthetics may provide effective treatment in patients with SA, SE, and DS scenarios but the quality of evidence is low. Higher-quality powered prospective studies of the efficacy and safety of using volatile anesthetics to manage SA, SE, and DS patients are required. Education regarding inhaled anesthetics and the protocolization of their use is needed.
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- 2024
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5. Radiographic and Clinical Results of 4rd Generation Minimally Invasive Bunion Surgery for Symptomatic Hallux Valgus
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Solangel Rodriguez-Materon MD, Kyra E. Lopez MSc, Cary Chapman MD, Grant Chapman, Christopher Hodgkins MD, FAAOS, and Thomas P. San Giovanni MD
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Orthopedic surgery ,RD701-811 - Abstract
Category: Bunion; Other Introduction/Purpose: Minimally invasive techniques for surgical treatment of hallux valgus has gained popularity over the past few years. Most published reports involve combined minimally invasive Chevron and Akin osteotomies (MICA) performed by a single surgeon. This study reports radiographic and clinical results on patients who underwent minimally invasive transverse distal 1st metatarsal and Akin osteotomies by 3 fellowship trained Foot & Ankle orthopedic surgeons. A minimally invasive transverse distal 1st metatarsal osteotomy has advantages over MIS chevron osteotomy as it is less technically demanding and in theory, the surgeon can control 1st metatarsal head rotation to improve sesamoid position. Methods: Ninety-five consecutive patients between 2019 and 2021 with symptomatic Hallux valgus without 1st tarsometatarsal or metatarsal phalangeal joint arthritis or TMT joint instability were followed for at least one year. Primary radiographic outcomes include pre and postoperative hallux valgus and 1-2 intermetatarsal angles. Pain relief was measured by VAS scores. Patient Reported Outcomes (PROMS) used were Foot and Ankle Mobility (FAAM) scores in the dimension of activities of daily living (ADL) and sports. PROMS measured at one year follow-up. Radiographic recurrence was defined as a change in HVA >2.6 degrees between any 2 postoperative radiographs and an HVA >15 degrees. Z-Scores were calculated depending on the patient's demographics based on normative values to assess the deviation from a normal population FAAM scores. Results: Demographics and preoperative bunion classification of all patients included in this study can be found in table 1. Average pre-op HVA and IMA were 24.9 and 12.2 degrees respectively and improved to 8.43 and 5.86 degrees (p < 0.01) at 3 months. From the 3 months to 12 months, the patients’ HVA and IMA average was 9.39 and 6.85, but this change was not statistically significant (p = 0.35). VAS scores improved from 5.37 preoperatively to 1.9 at final follow up (p < 0.01). The average postoperative FAAM ADL score was (86.34 +/- 17.18) and z-score was (-0.08 +/- 1.16). The average postoperative FAAM sport score was (66.12 +/- 30.93) and z-score was (-0.26 +/- 1.94). Conclusion: Overall, the results of the study affirm the literature that third generation MIS hallux valgus surgery remains a good option. This study showed no infections in patients undergoing MIS hallux valgus surgery and the correction of the hallux valgus angles that persisted at 12 months with low recurrence rates. At this time, the results show a trend toward lower FAAM scores postoperatively at one year follow-up that was significant in the sports subscore but the difference from a normal population is not significant in the ADL subscore. Longer follow-up is needed to evaluate the trend further.
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- 2023
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6. Does use of Allograft Affect Union Rates in Minimally Invasive Hallux Valgus Surgery?
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Jorge Gil, Kyra E. Lopez MSc, Christian Guevara BA, Claire Callan BA, Steven Latta BS, and Cary Chapman MD
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Orthopedic surgery ,RD701-811 - Abstract
Category: Bunion; Basic Sciences/Biologics Introduction/Purpose: Hallux valgus is a common foot deformity that can cause significant discomfort. Surgical correction of hallux valgus can be achieved through various techniques with minimally invasive surgery (MIS) gaining popularity amongst surgeons. The use of allograft in traditional open approaches has been proposed to improve the outcomes of hallux valgus repair by expediting time to union. We performed a retrospective analysis of patients undergoing MIS hallux valgus correction with and without the allograft at time of surgery. The primary aim of our study was to determine if use of allograft in hallux valgus MIS correction led to different time to union as well as rate of unions. Methods: A retrospective analysis was conducted to compare outcomes of patients who underwent hallux valgus correction with or without allograft. Patients included in the analysis underwent primary hallux valgus correction using third generation minimally invasive techniques and had postoperative weightbearing x-rays. Exclusion criteria included revision surgery, open surgeries, and loss-to-follow up. All surgeries were performed by three fellowship trained Foot and Ankle Orthopaedic surgeons at a single center from September 2019 to December 2022. All patients had similar post operative protocols. The allograft group received 2- 5 cc’s of a demineralized bone matrix (DBM) gel. Radiographs were evaluated by two independent orthopedic surgeons who were blinded to the patient's group allocation. The primary outcome of this study was time to radiographic union and rate of union. The data was analyzed using the independent t- test for continuous variables and the Fisher Exact test for categorical variables. Results: Seventy-two patients (77 feet) met inclusion criteria: allograft group (n=25) and a control group (n=52). Demographics between both groups were similar; the overall demographics can be found in Table 1. In our study, all 77 feet obtained complete union and no malunions or non-unions were observed in either group. The average time to complete union for the allograft group was 3.52 months (± 1.58) and the control group was 4.36 months (± 2.20); union times between groups did not reach statistical significance (p = 0.09) but did demonstrate a trend towards significance (Figure 1.) Maintenance of surgical correction was observed in all patients. Conclusion: While there was no statistically significant difference in union time and/or rates between the allograft group and control group, the allograft recipients had a reduction in the average time to union post MIS hallux valgus correction. No differences were observed with regards to radiographic recurrence nor complications between the two groups. This study suggests that demineralized bone matrix allograft may potentially decrease time to union but further studies are needed to confirm this.
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- 2023
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7. Long-Term Patient Outcomes for Treatment of Difficult Osteochondral Lesions of the Talus with Particulated Juvenile Allograft Cartilage Implantation with and without Calcaneal Autograft
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Joseph Manzi MD, Kshitij Manchanda MD, Matthew Nasra MD, Suleiman Sudah MD, Carlo Coladonato MS, Theodore Quan BS, Mark Wishman BS, Jay Moran BS, Daniel P. Murray MD, and Cary Chapman MD
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Orthopedic surgery ,RD701-811 - Abstract
Category: Ankle; Other Introduction/ Purpose: Osteochondral lesions of the talus (OCLT) are common injuries that can be difficult to treat. To date, long-term patient reported outcome measures (PROMs) of patients with particulated juvenile allograft cartilage implantation with or without calcaneal autograft have not been compared. Methods: From 2010-2012, thirteen patients with difficult to treat OCLTs underwent arthroscopic-assisted implantation of particulated juvenile allograft cartilage (DeNovo NT ® ) with or without autogenous calcaneal bone grafting by a single surgeon. Calcaneal bone graft use was determined by lesion size >150 mm 2 and/or deeper than 5 mm. Patients were evaluated using physical examination, patient interviews, and PROMs. Pre-operative and post-operative PROMs were compared with a Mann Whitney test. Results: When comparing patients in regards to calcaneal bone graft implantation, no difference in age, BMI, pre-operative PROMs, or follow-up was noted, however, calcaneal bone graft patients did have a significantly larger lesion size (188.5±50.9 vs. 118.7±29.4mm 2 respectively; p-value=0.027). VAS and FAAM ADL scores during final follow-up improvement did not significantly differ between cohorts. The FAAM Sports score improved significantly more for the DeNovo alone group compared to the bone graft cohort (p-value=0.032). The AOFAS score improvement did not differ between cohorts (p-value=0.944), however, the SF-36 PCS improved significantly more for the DeNovo alone group compared to the bone graft cohort (p-value=0.038). No intraoperative/perioperative complications were observed with calcaneal bone grafting. Conclusion: While patients followed over the course of ~8 years after implantation of particulated juvenile allograft cartilage (DeNovo NT ® ) with/without autogenous calcaneal bone graft had positive post-operative PROMs, patients without calcaneal bone graft had significantly greater improvement in functional outcome scores. Whether these differences are due to graft incorporation or larger lesion size is unclear.
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- 2023
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8. Patient Reported Outcomes with the Use of Fibular Nail Fixation, Retrospective Review of 41 Cases
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Solangel Rodriguez-Materon MD, Kyra E. Lopez MSc, Samantha Trynz MS, Jorge Fleites MD, Cary Chapman MD, Thomas P. San Giovanni MD, and Christopher Hodgkins MD, FAAOS
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Orthopedic surgery ,RD701-811 - Abstract
Category: Trauma; Ankle Introduction/Purpose: Traditionally, open reduction and internal fixation of unstable lateral malleolus fractures with plate and screw constructs has been considered the gold standard treatment. More recently, the use of an intramedullary fibula nail has gained popularity as an alternative treatment method using a mini open incision to obtain anatomic reduction. The minimally invasive nature of this technique and the no profile load bearing/sharing implant is reported with very low complication rates and a much lower incidence of implant irritation and removal. We report our surgical and patient reported outcomes for a cohort of single surgeon consecutive fibula nails with proximal and distal locking fixation. Methods: We retrospectively reviewed prospectively collected data on 41 patients that were implanted with the Fibulock® Fibula Nail (Arthrex, Naples, Florida, USA). All nails were implanted by a single surgeon. Intraoperative reduction quality was recorded, and patients were followed post operatively with radiographs that were assessed for maintenance of reduction, healing, and complications. Patient reported outcome questionnaires (PROMs) were collected preoperatively and at 3, 6, 12, and 24 months postoperatively. The Foot and Ankle Ability Measure (FAAM) assessed the patient’s functional status in terms of activities of daily living and sports. The Visual Analogue Score (VAS) was also collected. Results: All 41 patients had one- to two- year follow-up (14.68 months ± 5.92). Demographics are listed on table 1. Forty of the patients were reduced via mini open incision and one was reduced closed. There were no conversions to a plate, no intraoperative complications, and no cases of loss of reduction postoperatively. No patient required revision surgeries, no cases of delayed union or nonunion, and zero superficial or deep postoperative infections. Statistical analysis revealed a significant difference between preoperative and postoperative FAAM scores overall (+67.52, p < 0.001), within activities of daily living (+68.07, p < 0.001), and sport (+65.95, p < 0.001). Also, there was a significant difference between preoperative VAS and postoperative VAS (+4.73, p < 0.001). Conclusion: Our results support existing literature that fixation of fibula fractures with an intramedullary nail with proximal and distal locking capabilities is an alternative option to a plate and screw construct, with a very low incidence of hardware related complications requiring removal, and favorable patient reported outcomes.
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- 2023
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9. Retrospective Review of 200 Consecutive, Single Surgeon, Fibula Nails with Proximal and Distal Fixation
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Solangel Rodriguez-Materon MD, Kyra E. Lopez MSc, Samantha Trynz MS, Cary Chapman MD, Jorge Fleites MD, and Christopher Hodgkins MD, FAAOS
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Orthopedic surgery ,RD701-811 - Abstract
Category: Trauma; Ankle Introduction/Purpose: Ankle fractures are one of the most common injuries presenting to orthopedic surgeons. Unstable ankle fractures require surgical intervention and the most common fixation method is the use of a plate and screw construct. However, this requires an extensive open incision, which potentially increases the risk of post-operative wound complications and the possibility of hardware irritation. The purpose of this abstract is to evaluate the clinical outcomes of the treatment of unstable lateral malleolar fractures using a fibula nail with both proximal and distal locking capabilities from our original cohort, and in our increased cohort of 200 consecutive single surgeon fibula nails using a mini open incision to anatomically reduce. Methods: We retrospectively reviewed 200 consecutive FibuLock Fibula Nail® fixation constructs (Arthrex, Naples, FL, USA) of a single surgeon in a private practice community hospital. Demographic, operative, clinical, and radiographic outcome data were analyzed. Results: The average follow-up time of the patients was 18.5 months. The demographics of the patients can be found in table 1. There were no cases of infection, loss of reduction, delayed union, or nonunion. All fractures healed. There were two cases of focal superficial epidermal lysis treated with local wound care, that did not require antibiotics. One patient required removal of the nail as a result of it being proud, which was an iatrogenic error. In our previously reported first 110 nails, we had to convert two fractures to plate fixation intraoperatively due to excessive comminution, which made the implantation more difficult. There were no further episodes of this in our next 90 cases due to adoption of plate assisted nail technique. Conclusion: The use of an intramedullary nail with a mini-open technique allows for anatomic fracture reduction and no-profile fixation, thus reducing the risk of wound complications and providing stable fixation. Our technique results in anatomic healing in nearly all patients. Also, there were no incidents of delayed or malunion and no postoperative loss of reduction. Our results demonstrated a very low complication rate compared to traditional plate fixation with good patient reported outcomes.
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- 2023
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10. Negativity and Positivity in the ICU: Exploratory Development of Automated Sentiment Capture in the Electronic Health Record
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Chris J. Kennedy, PhD, Catherine Chiu, MD, Allyson Cook Chapman, MD, Oksana Gologorskaya, MS, Hassan Farhan, MD, Mary Han, MD, MacGregor Hodgson, MD, Daniel Lazzareschi, MD, Deepshikha Ashana, MD, MBA, MS, Sei Lee, MD, Alexander K. Smith, MD, MPH, Edie Espejo, MA, John Boscardin, PhD, Romain Pirracchio, MD, PhD, and Julien Cobert, MD
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Medical emergencies. Critical care. Intensive care. First aid ,RC86-88.9 - Abstract
OBJECTIVES:. To develop proof-of-concept algorithms using alternative approaches to capture provider sentiment in ICU notes. DESIGN:. Retrospective observational cohort study. SETTING:. The Multiparameter Intelligent Monitoring of Intensive Care III (MIMIC-III) and the University of California, San Francisco (UCSF) deidentified notes databases. PATIENTS:. Adult (≥18 yr old) patients admitted to the ICU. MEASUREMENTS AND MAIN RESULTS:. We developed two sentiment models: 1) a keywords-based approach using a consensus-based clinical sentiment lexicon comprised of 72 positive and 103 negative phrases, including negations and 2) a Decoding-enhanced Bidirectional Encoder Representations from Transformers with disentangled attention-v3-based deep learning model (keywords-independent) trained on clinical sentiment labels. We applied the models to 198,944 notes across 52,997 ICU admissions in the MIMIC-III database. Analyses were replicated on an external sample of patients admitted to a UCSF ICU from 2018 to 2019. We also labeled sentiment in 1,493 note fragments and compared the predictive accuracy of our tools to three popular sentiment classifiers. Clinical sentiment terms were found in 99% of patient visits across 88% of notes. Our two sentiment tools were substantially more predictive (Spearman correlations of 0.62–0.84, p values < 0.00001) of labeled sentiment compared with general language algorithms (0.28–0.46). CONCLUSION:. Our exploratory healthcare-specific sentiment models can more accurately detect positivity and negativity in clinical notes compared with general sentiment tools not designed for clinical usage.
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- 2023
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11. Computerized Chemosensory-Based Orbitofrontal Cortex (CBOT) for Opioid Use Disorder (CBOT-OUD)
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National Institute on Drug Abuse (NIDA), Howard University, Family and Medical Counseling Service, Inc, Maryland Treatment Centers @ ARTC, Clinics of Dr. Edwin Chapman, MD, PC @ MHDG, and Evaristus Awele Nwulia, Chief Scientific Officer
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- 2021
12. Open Gluteus Medius Double-Row Repair With Acellular Allograft Augmentation
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Bruno Capurro MD, PhD, Daniel J. Kaplan MD, Thomas W. Fenn BS, Reagan S. Chapman MD, and Shane J. Nho MD, MS
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Sports medicine ,RC1200-1245 ,Orthopedic surgery ,RD701-811 - Abstract
Background: Gluteus medius tears are a common pathology affecting the lower extremity, predominantly in older female patients, and most often caused by chronic degenerative changes. Due to the associated morbidity with gluteus medius insufficiency, various surgical repair techniques are utilized, including open and endoscopic approaches, with equivalent biomechanical outcomes. Indications: Open gluteus medius double-row repair with acellular allograft augmentation is indicated for patients with massive, full thickness tears, full thickness tears with extensive retraction, degenerative tears, poor tissue quality, revision cases where tendon reduction to the footprint is challenging, and impaired hip abduction strength. The primary benefit of acellular allograft use is the provision of immediate structural strength to the repair construct. Technique Description: The patient is placed in the lateral decubitus position, and a direct lateral incision is made over the greater trochanter. The gluteus medius and/or minimus tendons are identified, mobilized, and provisionally reduced to the footprint. The tendon footprint is then debrided, and proximal anchors are placed. The graft is provisionally fixed to the tendon with sutures anteriorly and posteriorly to ensure correct placement. Sutures are passed from the proximal row through the tendon and prepared allograft, where 1 suture limb from each mattress is placed into a double-row anchor in the distal row. Once secured, the repair is checked through a range of dynamic positions. Results: Although outcomes studies are limited, case series of patients undergoing open gluteus medius repair with allograft have demonstrated favorable patient-reported outcomes, improved pain, improved hip abduction strength, and improved gait. Discussion: Open gluteus medius repair with acellular allograft provides immediate structural strength to the repair construct and should be considered in patients with massive, full thickness tears with extensive retraction, degenerative tears with poor tissue quality, revision cases, and impaired hip abduction strength. Patient Consent Disclosure Statement: The author(s) attests that consent has been obtained from any patient(s) appearing in this publication. If the individual may be identifiable, the author(s) has included a statement of release or other written form of approval from the patient(s) with this submission for publication.
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- 2023
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13. Effectiveness and safety of dupilumab in adults with moderate and severe atopic dermatitis in Colombia: Real-life experience
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Julián Londoño, MD, Lucia Perez, MD, Sergio Moreno, MSc, Edgardo Chapman, MD, María Beatriz Garcia, MD, Ana María Celis, MD, María Angélica Muñoz, MD, David Castillo, MD, Jorge Sánchez, MD, Yaicith Arevalo, MD, Ana Lozano, MD, MSc, Nelson J. Alvis-Zakzuk, MSc, Cesar Muñoz, MD, MSc, Laura Botero, Catalina Beltran, MD, and Elizabeth García, MD
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Atopic dermatitis ,Dupilumab ,Eczema ,Biologic therapy ,Immunologic diseases. Allergy ,RC581-607 - Abstract
Background: Dupilumab is a treatment approved for uncontrolled moderate-to-severe atopic dermatitis (AD). Tropical and developing countries such as Colombia have characteristics that may impact the natural history of AD and access to medical treatments. In that sense, we aimed to describe the effectiveness and safety of dupilumab in adults with moderate to severe AD in a Colombian multicenter cohort. Methods: Multicenter descriptive study that included patients who started treatment between March 2018 and May 2020 in 6 centers. Disease severity was assessed using the following: Scoring Atopic Dermatitis (SCORAD), Eczema Area and Severity Index (EASI), Patient Oriented Eczema Measure (POEM), and Dermatology Life Quality Index (DLQI). These measurements were collected according to availability at baseline, 3–5 months, 6–12 months, and more than 12 months. Days of sick leave, hospitalizations, and AD flares before and after dupilumab treatment were reported. Adverse events (AEs) were recorded during follow-up. Results: Ninety-three patients were included, with a median age of 32 years (IQR: 24.0; 40.0) and a disease evolution time of 21 years (IQR: 16.0; 29.5). 88.2% had at least 1 allergic disease other than AD. An improvement greater than or equal to 75% EASI was observed in 41.7% of patients at 3–5 months, in 73.7% of patients at 6–12 months, and in 75.0% of patients after 12 months. For those reporting SCORAD and POEM, the median percent change ([IQR], n) from baseline in SCORAD was −67.1 ([−79.2; −54.2], n = 16), −70.5 ([−85.8; −47.9], n = 36) and −66.7 ([−77.3; −51.0], n = 13); and POEM, −58.6 ([−66.4; −55.5], n = 4), −73.0 ([−86.5; −66.7], n = 16) and −87.3 ([−93.4; −69.6], n = 8), respectively. Before initiation of dupilumab treatment, 82 (88.2%) patients reported at least 1 flare of AD in the past 12 months. During the follow-up period, 30 (32.3%) patients reported at least 1 exacerbation or flare. Twelve patients (12.9%) presented an AE and 3 (3.2%) patients discontinued dupilumab for this cause. Conclusions: Dupilumab was effective and safe for the treatment of moderate to severe AD in point-of-care settings, with results similar to randomized controlled and other real-life studies. These positive results are still maintained even though a high number of patients had short interruptions in the use of dupilumab due to administrative problems.
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- 2023
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14. Ventilation Strategies During Extracorporeal Membrane Oxygenation for Neonatal Respiratory Failure: Current Approaches Among Level IV Neonatal ICUs
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John Ibrahim, MD, Burhan Mahmood, MD, Robert DiGeronimo, MD, Natalie E. Rintoul, MD, Shannon E. Hamrick, MD, Rachel Chapman, MD, Sarah Keene, MD, Ruth B. Seabrook, MD, Zeenia Billimoria, MD, Rakesh Rao, MD, John Daniel, MD, John Cleary, MD, Kevin Sullivan, MD, Brian Gray, MD, Mark Weems, MD, Daniel R. Dirnberger, MD, and for the CHNC ECMO Focus Group
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Medical emergencies. Critical care. Intensive care. First aid ,RC86-88.9 - Abstract
OBJECTIVES:. To describe ventilation strategies used during extracorporeal membrane oxygenation (ECMO) for neonatal respiratory failure among level IV neonatal ICUs (NICUs). DESIGN:. Cross-sectional electronic survey. SETTING:. Email-based Research Electronic Data Capture survey. PATIENTS:. Neonates undergoing ECMO for respiratory failure at level IV NICUs. INTERVENTIONS:. A 40-question survey was sent to site sponsors of regional referral neonatal ECMO centers participating in the Children’s Hospitals Neonatal Consortium. Reminder emails were sent at 2- and 4-week intervals. MEASUREMENTS AND MAIN RESULTS:. Twenty ECMO centers responded to the survey. Most primarily use venoarterial ECMO (65%); this percentage is higher (90%) for congenital diaphragmatic hernia. Sixty-five percent reported following protocol-based guidelines, with neonatologists primarily responsible for ventilator management (80%). The primary mode of ventilation was pressure control (90%), with synchronized intermittent mechanical ventilation (SIMV) comprising 80%. Common settings included peak inspiratory pressure (PIP) of 16–20 cm H2O (55%), positive end-expiratory pressure (PEEP) of 9–10 cm H2O (40%), I-time 0.5 seconds (55%), rate of 10–15 (60%), and Fio2 22–30% (65%). A minority of sites use high-frequency ventilation (HFV) as the primary mode (5%). During ECMO, 55% of sites target some degree of lung aeration to avoid complete atelectasis. Fifty-five percent discontinue inhaled nitric oxide (iNO) during ECMO, while 60% use iNO when trialing off ECMO. Nonventilator practices to facilitate decannulation include bronchoscopy (50%), exogenous surfactant (25%), and noninhaled pulmonary vasodilators (50%). Common ventilator thresholds for decannulation include PEEP of 6–7 (45%), PIP of 21–25 (55%), and tidal volume 5–5.9 mL/kg (50%). CONCLUSIONS:. The majority of level IV NICUs follow internal protocols for ventilator management during neonatal respiratory ECMO, and neonatologists primarily direct management in the NICU. While most centers use pressure-controlled SIMV, there is considerable variability in the range of settings used, with few centers using HFV primarily. Future studies should focus on identifying respiratory management practices that improve outcomes for neonatal ECMO patients.
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- 2022
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15. Clinical Outcomes of Patients With Unresectable Primary Liver Cancer Treated With Yttrium-90 Radioembolization With an Escalated Dose
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Re-I Chin, MD, MSCI, Anirudh Bommireddy, MD, Tyler J. Fraum, MD, Daniel R. Ludwig, MD, Yi Huang, MS, Jacqueline E. Zoberi, PhD, Jose L. Garcia-Ramirez, MS, Nichole M. Maughan, PhD, MS, William Chapman, MD, Kevin Korenblat, MD, Lauren E. Henke, MD, MSCI, Hyun Kim, MD, and Shahed N. Badiyan, MD
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Medical physics. Medical radiology. Nuclear medicine ,R895-920 ,Neoplasms. Tumors. Oncology. Including cancer and carcinogens ,RC254-282 - Abstract
Purpose: Yttrium-90 (90Y) radioembolization with an escalated dose has been shown to improve clinical outcomes compared with standard dose radioembolization, but there are few data on the local control of primary liver tumors. We reported the clinical outcomes of patients with unresectable primary liver tumors treated with 90Y radioembolization with an escalated dose. Methods and Materials: Clinical data of patients with unresectable hepatocellular carcinoma (HCC), cholangiocarcinoma (CC), and biphenotypic tumors (cHCC-CC) treated with radioembolization with an escalated dose (≥150 Gy) between 2013 and 2020 with >3 months follow-up were retrospectively reviewed. The primary endpoint was freedom from local progression. Clinical response was defined by Modified Response Evaluation Criteria in Solid Tumours and toxic effects were assessed using Common Terminology Criteria for Adverse Events version 5.0. Results: Fifty-three patients with HCC and 15 patients with CC/cHCC-CC were analyzed. The median dose delivered was 205 Gy (interquartile range, 183-253 Gy) and 198 Gy (interquartile range, 154-234 Gy) for patients with HCC and CC/cHCC-CC, respectively. The 1-year freedom from local progression rate was 54% (95% confidence interval [CI], 38%-78%) for patients with HCC and 66% (95% CI, 42%-100%) for patients with CC/cHCC-CC. For patients with HCC, United Network for Organ Sharing nodal stage 1 (P = .01), nonsolitary tumors (P = .02), pretreatment α-fetoprotein of >7.7 ng/mL (P = .006), and ≤268 Gy dose delivered (P = .003) were predictors for local progression on multivariate Cox analysis. No patients with HCC who received a dose >268 Gy had a local tumor progression. The 1-year overall survival for patients with HCC was 74% (95% CI, 61%-89%). After radioembolization, 5 (7%) patients had grade 3 ascites, and 4 (6%) patients had grade 3/4 hyperbilirubinemia. Conclusions: Treatment of unresectable primary liver tumors with 90Y radioembolization with an escalated dose was safe and well tolerated. Delivery of >268 Gy may improve local tumor control of HCC. Determination of the maximum tolerated dose needs to be performed in the context of future prospective dose-escalation trials to further evaluate the safety and efficacy of such an approach.
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- 2022
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16. Fluorescent angiography used as a tool to guide angiosome-directed endovascular therapy for diabetic foot ulcers
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Marshall Dworak, BS, Elizabeth A. Andraska, MD, S. Michael Gharacholou, MD, Melissa Myers, MD, and Scott C. Chapman, MD
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Angiosome-directed endovascular therapy ,Fluorescent angiography ,Surgery ,RD1-811 ,Diseases of the circulatory (Cardiovascular) system ,RC666-701 - Abstract
Angiosome-directed endovascular therapy for the treatment of chronic limb-threatening ischemia (CLTI) remains controversial owing to the overlap of wound angiosomes. Angiographic grading of success has limitations and translesional pressure assessments are seldom performed in the infrapopliteal vessels. Objective criteria to determine revascularization success in tibiopedal vessels have not been well described. Quantifying perfusion to a wound bed after establishing direct or indirect (via collateral) flow after revascularization is an important component for treating CLTI patients yet is seldom performed. We report the use of fluorescent angiography to quantitatively examine perfusion of a diabetic foot ulcer before and after angiosome-directed endovascular therapy.
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- 2021
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17. Nonutilization of Kidneys From Donors After Circulatory Determinant of Death
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Yingxin Lin, BSc, Armando Teixeira-Pinto, PhD, Helen Opdam, MD, Jeremy R. Chapman, MD, Jonathan C. Craig, PhD, Natasha Rogers, PhD, Henry Pleass, PhD, Christopher Davies, PhD, Stephen McDonald, PhD, Jean Yang, PhD, Wai Lim, PhD, and Germaine Wong, PhD
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Surgery ,RD1-811 - Abstract
Background. The expansion of donation after circulatory determination of death (DCDD) programs and unmet demands for kidney transplantation indicate that there is a need to improve the efficiency and utilization of these organs. Methods. We studied all DCDD donors retrieved for kidney transplantation in Australia between 2014 and 2019 and determined the factors associated with nonutilization using least absolute shrinkage and selection operator and random forest models. Self-organizing maps were used to group these donors into clusters with similar characteristics and features associated with nonutilization were defined. Results. Of the 762 DCDD donors, 116 (15%) were not utilized for kidney transplantation. Of the 9 clusters derived from self-organizing map, 2 had the highest proportions of nonutilized kidneys. Factors for nonutilization (adjusted odds ratio [95% confidence interval], per SD increase) were duration from withdrawal of cardiorespiratory support till death (1.38 [1.16-1.64]), admission and terminal serum creatinine (1.43 [1.13-1.85]) and (1.41 [1.16-1.73]). Donor kidney function and duration of warm ischemia were the main factors for clinical decisions taken not to use kidneys from DCDD donors. Conclusions. Donor terminal kidney function and the duration of warm ischemia are the key factors for nonutilization of DCDD kidneys. Strategies to reduce the duration of warm ischemia and improve post-transplant recipient kidney function may reduce rates of nonutilization.
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- 2022
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18. Endovascular approach to arterial branches mimicking a type II endoleak after popliteal artery aneurysm exclusion and bypass
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Scott C. Chapman, MD, Georges Al-Khoury, MD, and Steven A. Leers, MD
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Popliteal artery aneurysm enlargement following exclusion ,Surgery ,RD1-811 ,Diseases of the circulatory (Cardiovascular) system ,RC666-701 - Abstract
The management of popliteal artery aneurysms (PAAs) has continued to evolve. Open surgical treatment remains an excellent option. Aneurysm exclusion with saphenous vein bypass through a medial incision remains a preferred approach. After PAA exclusion, however, a possibility remains of sac expansion from geniculate arterial branches. This can mimic a type II endoleak occurring after endovascular aortic aneurysm repair. In the present report, we have described an endovascular technique used to treat an enlarging PAA after exclusion and bypass.
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- 2020
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19. Why Racial Justice Matters in Radiation Oncology
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Christina Hunter Chapman, MD, MS, Darlene Gabeau, MD, PhD, Chelsea C. Pinnix, MD, PhD, Curtiland Deville, Jr., MD, Iris C. Gibbs, MD, and Karen M. Winkfield, MD, PhD
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Medical physics. Medical radiology. Nuclear medicine ,R895-920 ,Neoplasms. Tumors. Oncology. Including cancer and carcinogens ,RC254-282 - Abstract
Recent events have reaffirmed that racism is a pervasive disease plaguing the United States and infiltrating the fabric of this nation. As health care professionals dedicated to understanding and alleviating disease, many radiation oncologists have failed to acknowledge how structural racism affects the health and well-being of the patients we aim to serve. The literature is full of descriptive statistics showing the higher incidence and mortality experienced by the Black population for health conditions ranging from infant mortality to infectious disease, including coronavirus disease 2019 (COVID-19). Acknowledgment that the root of health disparities experienced by Black people in this country are based in racism is essential to moving the nation and the field of radiation oncology forward. With this lens, a brief overview of structural and institutional racism shapes a discussion of what radiation oncologists and the organizations that represent them can do to address this scourge. As members of a technological field, we often harness the power of data to advance human health and approach challenging diseases with optimism that multidisciplinary effort can produce cure. A few principles to mitigate the longstanding issues of Black marginalization within the field have been recommended via the ATIP (Acknowledgment, Transparency, Intentionality, and rePresentation) and LEADS (Learn, Engage, Advocate, Defend, Support) approaches. However, additional introspection is encouraged. Just as individuals, practices, and organizations rallied to determine how best to address the issues related to the COVID-19 pandemic, the same investigational fervor must be applied to the issue of racism to combat this sinister and often deadly disease.
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- 2020
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20. Quantitative 3-Dimensional Photographic Assessment of Breast Cosmesis After Whole Breast Irradiation for Early Stage Breast Cancer: A Secondary Analysis of a Randomized Clinical Trial
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Bhavana V. Chapman, MD, Xiudong Lei, PhD, Prithvi Patil, MS, Shikha Tripathi, MS, Krista M. Nicklaus, MS, Aaron J. Grossberg, MD, PhD, Simona F. Shaitelman, MD, EdM, Alastair M. Thompson, MD, Kelly K. Hunt, MD, Thomas A. Buchholz, MD, FASTRO, Fatima Merchant, PhD, Mia K. Markey, PhD, Benjamin D. Smith, MD, FASTRO, and Jay P. Reddy, MD, PhD
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Medical physics. Medical radiology. Nuclear medicine ,R895-920 ,Neoplasms. Tumors. Oncology. Including cancer and carcinogens ,RC254-282 - Abstract
Purpose: Our purpose was to use 3-dimensional (3D) surface photography to quantitatively measure breast cosmesis within the framework of a randomized clinical trial of conventionally fractionated (CF) and hypofractionated (HF) whole breast irradiation (WBI); to identify how 3D measurements are associated with patient- and physician-reported cosmesis; and to determine whether objective measures of breast symmetry varied by WBI treatment arm or transforming growth factor β 1 (TGFβ1) status. Methods and Materials: From 2011 to 2014, 287 women age ≥40 with ductal carcinoma in situ or early-stage invasive breast cancer were enrolled in a multicenter trial and randomized to HF-WBI or CF-WBI with a boost. Three-dimensional surface photography was performed at 3 years posttreatment. Patient-reported cosmetic outcomes were recorded with the Breast Cancer Treatment Outcome Scale. Physician-reported cosmetic outcomes were assessed by the Radiation Therapy Oncology Group scale. Volume ratios and 6 quantitative measures of breast symmetry, termed F1-6C, were calculated using the breast contour and fiducial points assessed on 3D surface images. Associations between all metrics, patient- and physician-reported cosmesis, treatment arm, and TGFβ1 genotype were performed using the Kruskal-Wallis test and multivariable logistic regression models. Results: Among 77 (39 CF-WBI and 38 HF-WBI) evaluable patients, both patient- and physician-reported cosmetic outcomes were significantly associated with the F1C vertical symmetry measure (both P < .05). Higher dichotomized F1C and volumetric symmetry measures were associated with improved patient- and physician-reported cosmesis on multivariable logistic regression (both P ≤ .05). There were no statistically significant differences in vertical symmetry or volume measures between treatment arms. Increased F6C horizontal symmetry was observed in the CF-WBI arm (P = .05). Patients with the TGFβ1 C-509T variant allele had lower F2C vertical symmetry measures (P = .02). Conclusions: Quantitative 3D image-derived measures revealed comparable cosmetic outcomes with HF-WBI compared with CF-WBI. Our findings suggest that 3D surface imaging may be a more sensitive method for measuring subtle cosmetic changes than global patient- or physician-reported assessments.
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- 2020
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21. Workplace Gender Inequity Is Driven by Broader Societal Inequity: A Qualitative Study of Senior Japanese and American Radiation Oncologists
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Christina Hunter Chapman, MD, MS, Kyoko Nomura, MD, MPH, PhD, Ayesha Kothari, Namratha Atluri', and Anneyuko I. Saito, MD, PhD
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Medical physics. Medical radiology. Nuclear medicine ,R895-920 ,Neoplasms. Tumors. Oncology. Including cancer and carcinogens ,RC254-282 - Abstract
Purpose: Gender inequity in medicine harms society, and often originates in the context of broader societal discrimination. This study explores the experiences of older women in the radiation oncology specialty in Japan and the United States, with an emphasis on understanding how broader gender inequity affects career trajectory. Radiation oncology is an ideal setting to investigate cross-cultural physician gender equity issues, because few women enter the field despite fewer barriers (eg, frequent emergencies, evening/weekend hours, long procedures) that are commonly cited by women as deterrents in specialty selection. Methods and Materials: Between 2012 and 2016, the authors interviewed 14 older women in radiation oncology (department chairs or full professors), with 6 from Japan and 8 from the United States. Multiple analysts identified themes to explore the impact of societal gender inequity on female radiation oncologists’ careers. Results: Five themes were identified: (1) childhood gender constructs affect career aspirations, (2) persistent sexism and gender-based workplace challenges affect women's careers, (3) gender inequity in the home affects women's careers, (4) non–gender-related factors intersect to affect women's career satisfaction, and (5) attaining gender equity appears to be even more challenging in Japan compared with the United States. Conclusions: Female radiation oncologists in 2 of the most technologically advanced countries report that gender discrimination across their lifespans substantially affects career success. Because gender inequality reflects societal injustice and negatively affects scientific progress and patient outcomes, future research should focus on global approaches to address professional and domestic gender constructs that impede women's career progress.
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- 2022
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22. Arthroscopically Assisted Particulated Juvenile Allograft Cartilage Implantation and Bone Grafting for Treatment of Large Cystic Osteochondral Lesions of the Talus: A Case Series
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Kshitij Manchanda MD, Joseph E. Manzi, and Cary B. Chapman MD
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Orthopedic surgery ,RD701-811 - Abstract
Category: Ankle; Arthroscopy; Basic Sciences/Biologics; Sports; Trauma Introduction/Purpose: Osteochondral lesions of the talus (OCLT) are common traumatic injuries and can be difficult to treat. Conventional methods consist of arthroscopic debridement and bone marrow stimulation techniques including microfracture, curettage, abrasion chondroplasty and antegrade/retrograde drilling predominantly leading to fibrocartilage formation. These methods have proved effective for small lesions; however, larger lesions with accompanying subchondral bone cysts require more invasive treatment with osteochondral allografts or autologous chondrocyte implantation. These procedures can require harvesting of osteochondral grafts from the knee or malleolar osteotomies, which have associated donor site morbidities and complications of osteotomy healing. We describe an alternative method, an all-arthroscopic technique to treat these large cystic OCLTs, and sought to determine long-term quality of life metrics for a cohort of patients. Methods: From 2010-2012, six patients with difficult to treat OCLTs underwent arthroscopic-assisted implantation of particulated juvenile allograft cartilage with viable chondrocytes (DeNovo NT) along with autogenous bone grafting from the calcaneus by a single surgeon. These lesions all had associated cystic changes requiring bone graft to fill the defect. Other inclusion criteria included at least two of the following: 1) shoulder lesions, 2) lesion size > 200 mm 2 , 3) failed previous microfracture treatment, or 4) age > 40 with a Body Mass Index (BMI) > 25 kg/m 2 . These six patients were fully evaluated using physical examination, patient interviews, and outcome score measures. Follow-up was completed at 2 years, 4 years, and between 6-9 years at their most recent visit. Pre-operative and post-operative functional outcome scores were compared with Wilcoxon Signed Ranked Test. Results: Six patients (age: 43.8 + 14.0 years, BMI: 28.4 + 6.7 kg/m 2 ) had average lesion sizes of 188.5 + 50.9 mm 2 (range: 125-260 mm 2 ) and most recent follow-up of 8.4 + 1.2 years (range: 6.0-9.3 years). Post-operatively, average VAS pain scores decreased by 4.2 points, 95% CI [1.6-6.8]. FAAM ADL scores improved from 41.8 to 72.5, 95% CI [11.3-50.1]. SF-36 Physical Component Scores also showed significant improvement by 37.8 points, 95% CI [20.8-54.8]. FAAM Sports (p = 0.055) and AOFAS (p = 0.066) scores clinically improved from 13.3 to 39.2 and 57.7 to 86.3, respectively, and approached statistical significance. There were no intraoperative or perioperative complications with calcaneal bone grafting. Conclusion: A small cohort of patients followed over the course of ~8 years after implantation of particulated juvenile allograft cartilage (DeNovo NT) and autogenous calcaneal bone graft for cystic OCLTs had positive post-operative, self-reported functional outcomes. Patients significantly improved compared to pre-operative measures, with no complications observed. This may be an effective long-term treatment for patients with difficult to treat OCLTs.
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- 2022
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23. Long Term Outcome Measures Following Arthroscopically Assisted Particulated Juvenile Allograft Cartilage Implantation for Treatment of Difficult to Treat Osteochondral Lesions of the Talus
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Cary B. Chapman MD, Joseph E. Manzi, and Kshitij Manchanda MD
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Orthopedic surgery ,RD701-811 - Abstract
Category: Ankle; Arthroscopy; Sports Introduction/Purpose: Conventional methods are not suitable for difficult to treat osteochondral lesions of the talus (OCLT) such as those defects that are large, shoulder lesions, failed previous surgery, or certain patient factors. Osteochondral autograft transfer system (OATS) has been accepted as the primary method of treatment for these more difficult defects, however, complications such as residual knee pain from the graft site, a multiday procedure, and the necessity for a malleolar osteotomy have made this technique not devoid of complications. Particulated juvenile articular cartilage transplantation for these lesions has theoretical advantage of performing the procedure arthroscopically, without need for an osteotomy or autograft. The purpose of this study is to determine long term patient reported outcomes for this procedure. Methods: Thirteen patients with difficult to treat OCLT underwent arthroscopic assisted implantation of DeNovo NT graft into defects from 2010-2012 by the same surgeon. 'Difficult to treat’ was defined as having at least three of the following features or two if both variables described lesion characteristics: 1) lesions size of 107mm 2 or greater, 2) shoulder lesions, 3) patients who failed microfracture, 4) patient age over 40, or 5) patient BMI>25kg/m 2 . Patients were evaluated using physical examination, patient interviews, and pre and postoperative outcome score measures utilizing Visual Analogue Scale, Short Form 36 and Foot and Ankle Ability Measurement questionnaires, and the American Orthopaedic Foot & Ankle Society (AOFAS) ankle-hindfoot scale. Patients had follow-up at 2 years, 4 years, and between 6-9 years at their most recent follow-up. Differences in functional outcome scores were compared before and after surgery. Results: Patients (Age: 46.5+-11.8years, Body Mass Index: 28.5 +-6.1kg/m 2 ) had on average, most recent follow-up of 8.0 years (range 72-113 months). Average VAS pain score decreased for patients by 3.9 points, 95% CI [2.18, 5.60], when compared to preoperative assessment. FAAM ADL and Sports scores also showed improvement from 46.5 to 80.9, 95% CI [21.35, 47.43] and from 18.8 to 57.9, 95% CI [21.05, 57.10], respectively. SF-36 physical component scores showed significant improvement by an average of 45.5 points, 95% CI [32.42, 58.50]. AOFAS scores improved from 55.2 to 80.3, 95% CI [12.459, 37.741]. Patient demographics and results are seen in Tables 1 and 2 respectively. Conclusion: These results demonstrate clinically positive long-term outcomes for a cohort of patients with difficult OCLT, followed over the course of 6-8 years after treatment with arthroscopic assisted DeNovo NT implantation. Understanding the longevity of this intervention can better aid clinicians in deciding if this treatment option is appropriate for patients and should ultimately be included as part of the orthopedics’ armamentarium.
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- 2022
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24. Novel heterozygous COL7A1 mutation in a patient with de-novo dominant dystrophic epidermolysis bullosa pruriginosa
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Tasya Rakasiwi, BS, Shu Ting Liang, BA, Brian J. Simmons, MD, and M. Shane Chapman, MD
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COL7A1 gene ,dystrophic epidermolysis bullosa ,pruriginosa subtype ,Dermatology ,RL1-803 - Published
- 2021
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25. Dual Lactate Clearance in the Viability Assessment of Livers Donated After Circulatory Death With Ex Situ Normothermic Machine Perfusion
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Min Xu, MD, Fangyu Zhou, MD, Ola Ahmed, MD, Lucy V. Randle, BSc, Jun-Kyu Shin, PhD, Yuehui Zhu, PhD, Gundumi A. Upadhya, PhD, Kathleen Byrnes, MD, Brian Wong, PhD, Jae-Sung Kim, PhD, Yiing Lin, MD, PhD, and William C. Chapman, MD
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Surgery ,RD1-811 - Abstract
Background. Perfusate lactate clearance (LC) is considered one of the useful indicators of liver viability assessment during normothermic machine perfusion (NMP); however, the applicable scope and potential mechanisms of LC remain poorly defined in the setting of liver donation after circulatory death. Methods. The ex situ NMP of end-ischemic human livers was performed using the OrganOx Metra device. We further studied the extracellular signal-regulated kinases (phospho-extracellular signal-regulated kinase1/2 [pERK1/2]) pathway and several clinical parameters of these livers with successful LC (sLC, n = 5) compared with non-sLC (nLC, n = 5) in the perfusate (
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- 2021
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26. Gender Differences in Work–Life Integration Among Medical Physicists
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Kelly C. Paradis, PhD, Kerry A. Ryan, MA, Spencer Schmid, Jean M. Moran, PhD, Anna M. Laucis, MD, MPhil, Christina H. Chapman, MD, Terri Bott-Kothari, MD, Joann I. Prisciandaro, PhD, Samantha J. Simiele, PhD, James M. Balter, PhD, Martha M. Matuszak, PhD, Vrinda Narayana, PhD, and Reshma Jagsi, MD, DPhil
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Medical physics. Medical radiology. Nuclear medicine ,R895-920 ,Neoplasms. Tumors. Oncology. Including cancer and carcinogens ,RC254-282 - Abstract
Purpose: To generate an understanding of the primary concerns facing medical physicists regarding integration of a demanding technical career with their personal lives. Methods and Materials: In 2019, we recruited 32 medical physics residents, faculty, and staff via emails to US medical physics residency program directors to participate in a 1-hour, semistructured interview that elicited their thoughts on several topics, including work–life integration. Standard techniques of qualitative thematic analysis were used to generate the research findings. Results: Of the participants, 50% were women and 69% were non-Hispanic White individuals, with a mean (SD) age of 37.5 (7.4) years. They were evenly split between residents and faculty or staff. Participant responses centered around 5 primary themes: the gendered distribution of household responsibilities, the effect of career or work on home and family life, the effect of family on career or work, support and strategies for reconciling work–life conflicts, and the role of professional societies in addressing work–life integration. Participants expressed concern about the effect of heavy workloads on home life, with female respondents more likely to report carrying the majority of the household burden. Conclusions: Medical physicists experience challenges in managing work–life conflict amid a diverse array of personal and professional responsibilities. Further investigations are needed to quantitatively assess the division of work and household labor by gender in medical physics, particularly after the outbreak of the COVID-19 pandemic, but this study's qualitative findings suggest that the profession should consider ways to address root causes of work–life conflict to promote the future success and well-being of all medical physicists, and perhaps women in particular.
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- 2021
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27. Use and Outcomes of SBRT for Early Stage NSCLC Without Pathologic Confirmation in the Veterans Health Care Administration
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Joel R. Wilkie, MD, PhD, Rachel Lipson, MS, Matthew C. Johnson, MD, Christina Williams, PhD, Drew Moghanaki, MD, MPH, David Elliott, MD, Dawn Owen, MD, Namratha Atluri, BS, Shruti Jolly, MD, and Christina Hunter Chapman, MD, MS
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Medical physics. Medical radiology. Nuclear medicine ,R895-920 ,Neoplasms. Tumors. Oncology. Including cancer and carcinogens ,RC254-282 - Abstract
Purpose: Stereotactic body radiation therapy (SBRT) use has increased among patients without pathologic confirmation (PC) of lung cancer. Empirical SBRT without PC raises concerns about variation in workup and patient selection, but national trends have not been well described. In this study, we assessed patterns of empirical SBRT use, workup, and causes of death among a large national non-small cell lung cancer (NSCLC) cohort. Methods and Materials: We identified 2221 patients treated with SBRT for cT1-T2aN0M0 NSCLC in the Veterans Affairs health care system from 2008 to 2015. We reviewed their pretreatment workup and assessed associations between absence of PC and clinical and demographic factors. We compared causes of death between PC and non-PC groups and used Cox proportional hazards modeling to compare overall survival and lung cancer specific survival (LCSS) between these groups. Results: Treatment without PC varied from 0% to 61% among Veterans Affairs medical centers, with at least 5 cases of stage I NSCLC. Overall, 14.9% of patients were treated without PC and 8.8% did not have a biopsy attempt. Ten percent of facilities were responsible for almost two-thirds (62%) of cases of treatment without PC. Of non-PC patients, 95.5% had positron emission tomography scans, 40.6% had biopsy procedures attempted, and 12.7% underwent endobronchial ultrasound. Non-PC patients were more likely to have cT1 tumors and live outside the histoplasmosis belt. Age, sex, smoking status, and Charlson comorbidity index were similar between groups. Lung cancer was the most common cause of death in both groups. Overall survival was similar between groups, whereas non-PC patients had better LCSS (hazard ratio = 0.77, P = .031). Conclusions: Empirical SBRT use varied widely among institutions and appropriate radiographic workup was consistently used in this national cohort. Future studies should investigate determinants of variation and reasons for higher LCSS among non-PC patients.
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- 2021
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28. Liquid biopsies in pancreatic cancer: targeting the portal vein
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Christopher G. Chapman, MD, Trevor Long, and Irving Waxman, MD, FASGE
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Diseases of the digestive system. Gastroenterology ,RC799-869 - Abstract
Abstract. Pancreatic cancer is a highly lethal malignancy with poor overall survival due to silent progression until primary tumor growth or metastatic dissemination develops clinical symptoms. Even in the minority of patients with early diagnosis and candidacy for curative intent surgery, postoperative recurrence after surgical resection is very frequent. Due to these findings, efforts to identify minimally invasive ways to provide earlier diagnosis and enhanced prognostication are increasingly warranted. Liquid biopsies assessing for tumor derived materials shed into the blood are a promising tool to accomplish this goal; however, in pancreatic cancer, peripheral blood analyses remain dependent on the degree of tumor burden with a prohibitively low yield until the cancer is widely metastatic. To overcome this limitation, increasing literature has emerged evaluating the possibility of portal venous blood as a new, potentially higher yield liquid biopsy target in pancreatic cancer. This review will discuss the current literature and clinical application potential of mesenteric vasculature, or portal venous blood, as liquid biopsies in the diagnosis, prognosis and management of patients with pancreatic cancer.
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- 2019
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29. Masson tumor (intravascular papillary endothelial hyperplasia) arising in a superficial temporal artery aneurysm
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Scott C. Chapman, MD, Peter W. Zak, MD, Mark Scaife, MD, Geoffrey Murdoch, MD, and Mohammad H. Eslami, MD
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Surgery ,RD1-811 ,Diseases of the circulatory (Cardiovascular) system ,RC666-701 - Abstract
Masson tumor (intravascular papillary endothelial hyperplasia) is a rare proliferation of endothelial cells within the wall of a vessel, often thought to represent an aberrant resolution of a thrombosis. We describe the unique case of a 75-year-old man who presented to the clinic with a tender, spontaneous aneurysmal dilation of his left superficial temporal artery (STA). Only 8% of all STA aneurysms are believed to be spontaneous true aneurysms, with the majority being post-traumatic pseudoaneurysms. After successful surgical resection, pathologic examination demonstrated a Masson tumor within an STA aneurysm. This paper describes a case in which both rare entities were discovered and briefly outlines the diagnostic and therapeutic modalities available. Keywords: Masson tumor, Superficial temporal artery aneurysm
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- 2019
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30. MRI Radiomic Features Are Independently Associated With Overall Survival in Soft Tissue Sarcoma
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Matthew B. Spraker, MD, PhD, Landon S. Wootton, PhD, Daniel S. Hippe, MS, Kevin C. Ball, MD, Jan C. Peeken, MD, Meghan W. Macomber, MD, Tobias R. Chapman, MD, Michael N. Hoff, PhD, Edward Y. Kim, MD, Seth M. Pollack, MD, Stephanie E. Combs, MD, and Matthew J. Nyflot, PhD
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Medical physics. Medical radiology. Nuclear medicine ,R895-920 ,Neoplasms. Tumors. Oncology. Including cancer and carcinogens ,RC254-282 - Abstract
Purpose: Soft tissue sarcomas (STS) represent a heterogeneous group of diseases, and selection of individualized treatments remains a challenge. The goal of this study was to determine whether radiomic features extracted from magnetic resonance (MR) images are independently associated with overall survival (OS) in STS. Methods and Materials: This study analyzed 2 independent cohorts of adult patients with stage II-III STS treated at center 1 (N = 165) and center 2 (N = 61). Thirty radiomic features were extracted from pretreatment T1-weighted contrast-enhanced MR images. Prognostic models for OS were derived on the center 1 cohort and validated on the center 2 cohort. Clinical-only (C), radiomics-only (R), and clinical and radiomics (C+R) penalized Cox models were constructed. Model performance was assessed using Harrell's concordance index. Results: In the R model, tumor volume (hazard ratio [HR], 1.5) and 4 texture features (HR, 1.1-1.5) were selected. In the C+R model, both age (HR, 1.4) and grade (HR, 1.7) were selected along with 5 radiomic features. The adjusted c-indices of the 3 models ranged from 0.68 (C) to 0.74 (C+R) in the derivation cohort and 0.68 (R) to 0.78 (C+R) in the validation cohort. The radiomic features were independently associated with OS in the validation cohort after accounting for age and grade (HR, 2.4; P = .009). Conclusions: This study found that radiomic features extracted from MR images are independently associated with OS when accounting for age and tumor grade. The overall predictive performance of 3-year OS using a model based on clinical and radiomic features was replicated in an independent cohort. Optimal models using clinical and radiomic features could improve personalized selection of therapy in patients with STS.
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- 2019
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31. Delayed Avascular Necrosis of the Talus Following Arthroscopic Os Trigonum Excision
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Kshitij Manchanda MD, Brent J. Larson DPM, and Cary B. Chapman MD
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Orthopedic surgery ,RD701-811 - Published
- 2021
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32. Timing of Urgent Inpatient Palliative Radiation Therapy
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Susan Y. Wu, MD, Emily Yee, NP, Jason W. Chan, MD, Christopher H. Chapman, MD, MS, Lauren Boreta, MD, and Steve E. Braunstein, MD, PhD
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Medical physics. Medical radiology. Nuclear medicine ,R895-920 ,Neoplasms. Tumors. Oncology. Including cancer and carcinogens ,RC254-282 - Abstract
Purpose: Urgent indications for palliative radiation therapy (RT) include malignant spinal cord compression, symptomatic brain metastases, pain, airway obstruction, and bleeding. Data on the timing of palliative RT in the inpatient setting are limited. We report our experience with inpatient palliative RT at a tertiary academic center and evaluate the effect of a dedicated inpatient palliative RT nurse practitioner (NP) on treatment timelines. Methods and Materials: We performed a retrospective, single-institution review of 219 inpatients consulted for RT to sites of metastatic disease between May 2012 and May 2018. We compared time-to-treatment intervals before and after integrating an NP for palliative RT in August 2017. Results: The median age of the 219 patients receiving RT was 61 years (interquartile range [IQR], 51-69 years). The most frequent indications were symptomatic brain metastases (73 patients [33%]), pain (61 patients [28%]), and cord/cauda compression (48 patients [22%]). The median time from consultation request to consult was 1 day (IQR, 0-2 days), and the median time from consultation request to first RT fraction was 3 days (IQR, 2-6 days). The median time from consultation request to RT was shorter for cord compression (2 [IQR, 1-4] days) than for pain (5 [IQR, 2-7] days) (P = .001) or symptomatic brain metastases (3 [IQR, 1-6] days; P = .037). With an NP, patients were more likely to undergo same-day consultation and simulation (75% vs 60%; P = .045), which was associated with shorter median duration from consultation to initiation of RT (1 [IQR, 0-3] days vs 4 [IQR, 2-7] days; P
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- 2021
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33. In Response to Comment On: Why Racial Justice Matters in Radiation Oncology
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Iris C. Gibbs, MD, Christina Hunter Chapman, MD, MS, Darlene Gabeau, MD, PhD, Chelsea C. Pinnix, MD, PhD, Curtiland Deville, Jr., MD, and Karen M. Winkfield, MD, PhD
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Medical physics. Medical radiology. Nuclear medicine ,R895-920 ,Neoplasms. Tumors. Oncology. Including cancer and carcinogens ,RC254-282 - Published
- 2020
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34. A How-to Guide to Building a Robust SARS-CoV-2 Testing Program at a University-Based Health System
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Stephen D. Nimer MD, Jennifer Chapman MD, Lisa Reidy PhD, Alvaro Alencar MD, YanYun Wu MD, PhD, Sion Williams PhD, Lazara Pagan MSN, Lauren Gjolaj MBA, Jessica MacIntyre MSN, Melissa Triana MBA, Barbara Vance PhD, David Andrews MD, Yao-Shan Fan MD, PhD, Yi Zhou MD, PhD, Octavio Martinez MD, Monica Garcia-Buitrago MD, Carolyn Cray PhD, Mustafa Tekin MD, Jacob L. McCauley PhD, Philip Ruiz MD, PhD, Paola Pagan MBA, Walter Lamar PhD, Maritza Alencar DNP, Daniel Bilbao PhD, Silvia Prieto MBA, Maritza Polania MBA, Maritza Suarez MD, Melissa Lujardo BSIE, Gloria Campos MSIE, Michele Morris MD, Bhavarth Shukla MD, Alberto Caban-Martinez PhD, DO, Erin Kobetz PhD, Dipen J. Parekh MD, and Merce Jorda MD, PhD, MBA
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Pathology ,RB1-214 - Abstract
When South Florida became a hot spot for COVID-19 disease in March 2020, we faced an urgent need to develop test capability to detect SARS-CoV-2 infection. We assembled a transdisciplinary team of knowledgeable and dedicated physicians, scientists, technologists, and administrators who rapidly built a multiplatform, polymerase chain reaction- and serology-based detection program, established drive-through facilities, and drafted and implemented guidelines that enabled efficient testing of our patients and employees. This process was extremely complex, due to the limited availability of needed reagents, but outreach to our research scientists and multiple diagnostic laboratory companies, and government officials enabled us to implement both Food and Drug Administration authorized and laboratory-developed testing–based testing protocols. We analyzed our workforce needs and created teams of appropriately skilled and certified workers to safely process patient samples and conduct SARS-CoV-2 testing and contact tracing. We initiated smart test ordering, interfaced all testing platforms with our electronic medical record, and went from zero testing capacity to testing hundreds of health care workers and patients daily, within 3 weeks. We believe our experience can inform the efforts of others when faced with a crisis situation.
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- 2020
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35. Achieving gender equity in the radiation oncology physician workforce
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Emma B. Holliday, MD, Malika Siker, MD, Christina H. Chapman, MD, MS, Reshma Jagsi, MD, DPhil, Danielle S. Bitterman, MD, Awad A. Ahmed, MD, Karen Winkfield, MD, PhD, Maria Kelly, MD, Nancy J. Tarbell, MD, and Curtiland Deville, Jr., MD
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Medical physics. Medical radiology. Nuclear medicine ,R895-920 ,Neoplasms. Tumors. Oncology. Including cancer and carcinogens ,RC254-282 - Abstract
There is currently much interest in identifying and mitigating gender inequity within medicine, the greater workforce and society as a whole. We provide an evidence-based review of current and historical trends in gender diversity in the RO physician workforce and identify potential barriers to diversity and inclusion in training, professional development, and career advancement. Next, we move to actionable items, addressing methods to mitigate bias, harassment, and other impediments to professional productivity and characterizing leadership lessons and imperatives for departmental, institutional, and organizational leaders.
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- 2018
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36. Perforated jejunitis in a child with acute lymphoblastic leukemia treated with pegaspargase
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Elizabeth R. Tang, MD, Teresa Chapman, MD, MA, Laura S. Finn, MD, and Kasey J. Leger, MD, MSc
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Medical physics. Medical radiology. Nuclear medicine ,R895-920 - Abstract
Survival rates of children with acute lymphoblastic leukemia have improved since the incorporation of asparaginase in the treatment protocol, but the medication has potential serious complications, including vascular thrombosis. Here, we describe the case of a 13-year-old boy with pre-T-cell acute lymphoblastic leukemia whose treatment course was complicated by perforated jejunitis requiring resection of a portion of his small bowel. Pathologic assessment showed transmural ischemia, mesenteric venous and arterial thrombi, and scattered cytomegalovirus inclusion bodies. Pediatric mesenteric ischemia is rare, and its consideration in patients treated with asparaginase is discussed. Keywords: Acute lymphoblastic leukemia, Pediatric, Asparaginase, Complications, Acute mesenteric ischemia, Computed tomography
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- 2018
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37. Endoscopic closure of a refractory enterocutaneous fistula by use of a fistula plug with fixation and mucosal oversewing
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Betty Li, MD, Steven Shamah, MD, Eric Swei, MD, and Christopher G. Chapman, MD
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Diseases of the digestive system. Gastroenterology ,RC799-869 - Published
- 2019
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38. The pervasive crisis of diminishing radiation therapy access for vulnerable populations in the United States, part 1: African-American patients
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Shearwood McClelland, III, MD, Brandi R. Page, MD, Jerry J. Jaboin, MD, PhD, Christina H. Chapman, MD, MS, Curtiland Deville, Jr, MD, and Charles R. Thomas, Jr, MD
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Medical physics. Medical radiology. Nuclear medicine ,R895-920 ,Neoplasms. Tumors. Oncology. Including cancer and carcinogens ,RC254-282 - Abstract
Introduction: African Americans experience the highest burden of cancer incidence and mortality in the United States and have been persistently less likely to receive interventional care, even when such care has been proven superior to conservative management by randomized controlled trials. The presence of disparities in access to radiation therapy (RT) for African American cancer patients has rarely been examined in an expansive fashion. Methods and materials: An extensive literature search was performed using the PubMed database to examine studies investigating disparities in RT access for African Americans. Results: A total of 55 studies were found, spanning 11 organ systems. Disparities in access to RT for African Americans were most prominently study in cancers of the breast (23 studies), prostate (7 studies), gynecologic system (5 studies), and hematologic system (5 studies). Disparities in RT access for African Americans were prevalent regardless of organ system studied and often occurred independently of socioeconomic status. Fifty of 55 studies (91%) involved analysis of a population-based database such as Surveillance, Epidemiology and End Result (SEER; 26 studies), SEER-Medicare (5 studies), National Cancer Database (3 studies), or a state tumor registry (13 studies). Conclusions: African Americans in the United States have diminished access to RT compared with Caucasian patients, independent of but often in concert with low socioeconomic status. These findings underscore the importance of finding systemic and systematic solutions to address these inequalities to reduce the barriers that patient race provides in receipt of optimal cancer care.
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- 2017
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39. Cerebral palsy and seizures in a child with tubulinopathy pattern dysgenesis and focal cortical dysplasia
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Kevin M. Sweet, MS, Dennis W.W. Shaw, MD, and Teresa Chapman, MD, MA
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Tubulinopathy ,Seizure ,Focal cortical dysplasia ,Magnetization transfer ,Developmental delay ,Medical physics. Medical radiology. Nuclear medicine ,R895-920 - Abstract
A 7-year-old boy with a history of spasticity, global developmental delay, and seizures was given the general diagnosis of cerebral palsy at an early age. Chromosomal array analysis performed at an outside center was normal. The patient's family sought neurodevelopmental pediatric care at a new institution following a move out of state. Electroencephalography confirmed abnormal epileptogenic activity. Brain magnetic resonance imaging showed findings consistent with a tubulin gene defect (tubulinopathy) and of focal cortical dysplasia, as well as evidence of a remote occipital lobe injury. This case report describes the various brain magnetic resonance findings suggestive of a tubulin gene defect and raises the possibility of focal cortical dysplasia manifesting as a result of tubulin dysfunction.
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- 2017
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40. Acute infection of Viabahn stent graft in the popliteal artery
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S. Michael Gharacholou, MD, MSc, Marshall Dworak, Ala S. Dababneh, MD, Raj Varatharaj Palraj, MBBS, Michael C. Roskos, MD, and Scott C. Chapman, MD
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Surgery ,RD1-811 ,Diseases of the circulatory (Cardiovascular) system ,RC666-701 - Abstract
Peripheral stents are increasingly used for treatment of peripheral arterial disease, yet all implanted devices are potentially at risk for infection. We describe a 51-year-old man who underwent stenting in the femoropopliteal artery and presented 3 days later with leg pain, fever, and evidence of peripheral stigmata of embolization. Blood cultures grew methicillin-resistant Staphylococcus aureus and remained persistently positive despite antibiotic therapy. At surgical exploration, the popliteal artery had essentially been disintegrated by the infection, with only visible stent graft maintaining arterial continuity. Acute stent graft infections are rare and must be managed promptly to reduce morbidity.
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- 2017
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41. Classic autoimmune type 1 diabetes mellitus after a case of drug reaction with eosinophilia and systemic symptoms (DRESS)
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Audris Chiang, BA, Jessica Shiu, MD, PhD, Ashley N. Elsensohn, MD, MPH, Lance W. Chapman, MD, MBA, Sebastien de Feraudy, MD, PhD, and Janellen Smith, MD
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Dermatology ,RL1-803 - Published
- 2018
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42. Disparities in staging prostate magnetic resonance imaging utilization for nonmetastatic prostate cancer patients undergoing definitive radiation therapy
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Ayobami Ajayi, BA, Wei-Ting Hwang, PhD, Neha Vapiwala, MD, Mark Rosen, MD PhD, Christina H. Chapman, MD, Stefan Both, PhD, Meera Shah, BS, Xingmei Wang, MS, Atu Agawu, MD MPH, Peter Gabriel, MD, John Christodouleas, MD MPH, Zelig Tochner, MD, and Curtiland Deville, MD
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Medical physics. Medical radiology. Nuclear medicine ,R895-920 ,Neoplasms. Tumors. Oncology. Including cancer and carcinogens ,RC254-282 - Abstract
Purpose: There is growing evidence supporting incorporating multiparametric (mp) magnetic resonance imaging (MRI) scans into risk stratification, active surveillance, and treatment paradigms for prostate cancer. The purpose of our study was to determine whether demographic disparities exist in staging MRI utilization for prostate cancer patients. Methods and materials: An institutional database of 705 nonmetastatic prostate cancer patients treated with radiation therapy from 2005 through 2013 was used to identify patients undergoing versus not undergoing pretreatment diagnostic prostate mpMRI. Uni- and multivariable logistic regression evaluated the relationship of clinical and demographic characteristics with MRI utilization. Results: All demographic variables assessed, except the other race category, were significantly associated with MRI utilization (all P < .05), including age (odds ratio [OR], 0.92), black race (OR, 0.51), poverty (OR, 0.53), closer distance to radiation facility (OR, 1.79), and nonprivate primary insurance (OR, 0.57) on univariable analysis, while clinical stage T3 (OR, 3.37) was the only clinical characteristic. On multivariable analysis stratified by D'Amico risk group, age remained significant across all risk groups, whereas the black versus white racial (OR, 0.21; 95% confidence interval, 0.08-0.55) and nonprivate versus private insurance type (OR, 0.37; 95% confidence interval, 0.16-0.86) disparities persisted in the low-risk group. Clinical stage T3 remained associated in the high-risk group. For race specifically, the percentages of whites, blacks, and others undergoing MRI in the overall cohort and by risk group were, respectively: overall, 80% (343/427), 68% (156/231), and 85% (40/47); low risk, 86%, 56%, and 63%; intermediate risk, 79%, 72%, and 95%; and high risk, 72%, 72%, and 100%. Conclusions: In this urban, academic center cohort, older patients across all risk groups and black or nonprivate insurance patients in the low risk group were less likely to undergo staging prostate MRI scans. Further research should investigate these differences to ensure equitable utilization across all demographic groups considering the burden of prostate cancer disparities.
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- 2016
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43. Neutron radiation therapy for advanced thyroid cancers
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Tobias R. Chapman, MD, George E. Laramore, PhD, MD, Stephen R. Bowen, PhD, and Peter F. Orio III DO, MS
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Medical physics. Medical radiology. Nuclear medicine ,R895-920 ,Neoplasms. Tumors. Oncology. Including cancer and carcinogens ,RC254-282 - Abstract
Purpose: The aim of this study was to review institutional outcomes for advanced thyroid cancers treated with fast neutron radiation therapy (FNRT) and photon radiation therapy (RT). Methods and materials: In all, 62 consecutive patients were analyzed. Fifty-nine had stage IV disease. Twenty-three were treated with FNRT and 39 with photon RT. Median follow-up was 14 months. The primary endpoint was overall survival (OS). Results: There was no significant difference in median OS between FNRT and photon RT (26 vs 16 months; P = .49). Patients with well-differentiated histologies had superior median OS with photon RT (17 vs 69 months; P = .04). There was a nonsignificant trend toward improved OS with FNRT for medullary and anaplastic histologies. Conclusions: Outcomes in this study are in line with historical results. There is an apparent detriment in OS with FNRT for well-differentiated histologies and a trend toward improved OS with medullary and anaplastic histologies that warrants further investigation.
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- 2016
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44. Full-thickness endoscopic resection of an invasive adenocarcinoma in the right side of the colon
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Christopher G. Chapman, MD and Irving Waxman, MD, FASGE
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Diseases of the digestive system. Gastroenterology ,RC799-869 - Published
- 2017
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45. Antithrombin Perfluorocarbon Nanoparticles Improve Renal Allograft Function in a Murine Deceased Criteria Donor Model
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Chandu Vemuri, MD, Gundumi A. Upadhya, MD, Batool Arif, MD, Jianluo Jia, MD, Yiing Lin, MD, PhD, Joseph P. Gaut, MD, PhD, Jawad Fazal, MD, Hua Pan, MD, Samuel A. Wickline, MD, and William C. Chapman, MD
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Surgery ,RD1-811 - Abstract
Background. Over 100 000 patients await renal transplantation and 4000 die per year. Compounding this mismatch between supply and demand is delayed graft function which contributes to short-term and long-term graft failures. Previously, we reported that thrombin-targeted perfluorocarbon nanoparticles (PFC-NP) protect kidneys from ischemic renal injury after transient arterial occlusion. Here we hypothesize that perfusion of renal allografts with PFC-NP similarly can protect graft function after an ischemic interval. Methods. After 60 minutes of warm ischemia, male Lewis rats underwent left renal explantation followed by renal perfusion with 5 mL of standard perfusate alone (N = 3) or with 0.3 mL of untargeted PFC-NP (N = 5) or 0.3 mL thrombin-targeted of PFC NP functionalized with phenylalanine-proline-arginine-chloromethylketone (PPACK) (PFC-PPACK), an irreversible thrombin inhibitor (N = 5). Kidneys underwent 6 hours of cold storage, followed by transplantation into recipients and native nephrectomy. Animals were euthanized at 24 hours for tissue collection or at 48 hours for blood and renal tissue collection. A survival experiment was performed using the same protocol with saline control (N = 3), PFC-NP (N = 3) or PFC-PPACK (N = 6). Results. Serum creatinine was improved for the PFC-PPACK groups as compared with control groups (P < 0.04). Kaplan-Meier survival curves also indicated increased longevity (P < 0.05). Blinded histologic scoring revealed markedly attenuated renal damage in the PFC-PPACK group compared to untreated animals (2.75 ± 1.60 versus 0.83 ± 3.89; P = 0.0001) and greater preservation of renal vasculature. Conclusions. These results validate an NP-based approach to improve renal graft function as antithrombin NPs improved allograft function, decreased renal damage, protected vasculature, and improved longevity.
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- 2018
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46. Management of postendoscopic sleeve gastroplasty abscess
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Edward C. Villa, MD and Christopher G. Chapman, MD
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Diseases of the digestive system. Gastroenterology ,RC799-869 - Published
- 2019
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47. Unusual immunophenotypic variant of large B-cell lymphoma associated with HHV-8 and EBV in an HIV positive patient
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Roberto Ruiz-Cordero, MD, Jenna Lewis, MD, Clifford Blieden, MD, German Campuzano-Zuluaga, MD, Jose Hernandez, MD, Izidore S. Lossos, MD, Francis Ikpatt, MD, Jennifer R. Chapman, MD, and Francisco Vega, MD, PhD
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Primary effusion lymphoma ,Epstein–Barr virus ,Kaposi sarcoma-associated herpesvirus ,Human herpesvirus type 8 ,Pathology ,RB1-214 - Abstract
Human herpesvirus type 8, also known as Kaposi's sarcoma-associated herpesvirus (HHV-8/KSHV) has been associated with several lymphoproliferative disorders including Kaposi's sarcoma, primary effusion lymphoma (PEL), cases of multicentric Castleman's disease (MCD) including plasmablastic lymphoma associated with MCD, and germinotropic lymphoproliferative disorder. These lymphoproliferative disorders, with the exception of the latter, usually arise in HIV-positive or profoundly immunosuppressed patients. Herein, we describe an unusual large B-cell lymphoma in a 43 year-old male infected with HIV who presented with multiple lymphadenopathies. The tumor cells were positive for EBV, HHV-8/KSHV, CD20 (small subset), PAX5, and IgM and negative for CD138, and IgG. This lymphoma is difficult to classify following the 2008 WHO criteria and expands the current spectrum of viral-associated lymphomas.
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- 2015
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48. Anterior Talofibular Ligament Abnormalities on Routine Magnetic Resonance Imaging of the Ankle
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Joseph O’Neil MD, Elizabeth McDonald BA, Talia Chapman MD, David Casper MD, Rachel Shakked MD, and David Pedowitz MD, MS
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Orthopedic surgery ,RD701-811 - Abstract
Category: Ankle, Sports, Trauma Introduction/Purpose: The anterior talofibular ligament (ATFL) is one of the most commonly injured structures of the lower extremity after an ankle sprain. Evidence of remote injury to this structure is frequently encountered on magnetic resonance imaging (MRI) of the ankle, with uncertain clinical significance. Previous studies in the orthopaedic literature have discussed the prevalence of abnormal MRI findings in asymptomatic patients, most notably with regards to the spine and shoulder. More recently, a study on the prevalence of peroneal tendon abnormalities on routine MRI of the ankle was published. However, to our knowledge, no such study exists for the ATFL. The purpose of this study is to determine the prevalence of abnormal findings of the ATFL on MRI in asymptomatic individuals. Methods: All foot and ankle MRIs performed at our institution over a 4-month period were considered for inclusion in our study. Studies were excluded if performed on patients with documented ankle inversion injuries, ankle sprains, lateral ankle trauma, tenderness over the ATFL, or ankle instability. A total of 320 MRIs were eligible for inclusion. The integrity of the ATFL was noted in addition to the primary pathology. Results: The median age of the patients included in this study was 51 years with 203 females (63%) and 117 males (37%). One hundred eighteen (37%) of the 320 MRIs demonstrated some ATFL pathology. The most commonly encountered ATFL pathologies were thickening (38%), chronic tear (35%), attenuation (25%) and acute tear (2%). Conclusion: The results of this study demonstrate that a sizeable percentage of asymptomatic individuals (37%) will have ATFL abnormalities on magnetic resonance imaging of the foot and ankle. This study can have important clinical implications for patients who present with concerning MRI findings that do not correlate clinically. Based on our results, orthopaedic surgeons or any other physician providing musculoskeletal care can provide counseling and reassurance to patients who present with ATFL pathology on MRI but an absence of clinical findings. Much like MRI of the shoulder or spine, abnormalities must be correlated with the clinical exam.
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- 2017
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49. Clues to the Blues: Predictors of Self-Reported Mental and Emotional Health Among Older African American Men
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Jamie A. Mitchell PhD, Daphne C. Watkins PhD, Deirdre Shires MPH, MSW, Robert A. Chapman MD, and Janice Burnett RN
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Medicine - Abstract
The mental health needs of aging African American men have been overlooked and few studies have distinguished between more severe clinically diagnosable mental health challenges and less severe emotional states for this population. African American men may not identify with or internalize the terminology of “depression” despite exhibiting the symptom criteria. This exploratory cross-sectional study examined correlates of “downheartedness” as an alternative indicator of emotional health. The authors examined the self-reported responses of 1,666 older African American men on a baseline questionnaire from a larger longitudinal study. Demographic, physical, mental and emotional health, and health system factors were examined as possible correlates of downheartedness. The mean age of participants was 73.6 years and 74.8% of men described themselves as “downhearted and blue” most or all of the time while only 18.5% of them reported feeling moderate to severe anxiety or depression. When other factors were controlled, mobility problems (odds ratio [ OR ] = 2.36), problems getting health care ( OR = 2.69), having a doctor who never listens ( OR = 2.18), physical or mental problems that interfere with social activities ( OR = 1.34), accomplishing less due to physical health ( OR = 1.35), and accomplishing less due to mental/emotional health ( OR = 1.57) were all associated with greater odds of being downhearted. The current findings indicate that this sample more closely identified with language accurately describing their emotional health state (i.e., downhearted) and not with clinical mental health terminology (i.e., depression) that may be culturally stigmatized.
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- 2017
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50. Reexamining the Association of Body Mass Index With Overall Survival Outcomes After Liver Transplantation
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Su-Hsin Chang, PhD, Xiaoyan Liu, MS, Nils P. Carlsson, BS, Yikyung Park, ScD, Graham A. Colditz, PhD, Jacqueline M. Garonzik-Wang, MD, William C. Chapman, MD, Jason R. Wellen, MD, Maria B. Doyle, MD, and Tarek Alhamad, MD
- Subjects
Surgery ,RD1-811 - Abstract
Background. Several studies have shown that obese patients undergoing liver transplantation (LT) have an increased risk of mortality regardless of Model of End Stage Liver Disease (MELD) scores. The purpose of this study is to identify the range of body mass index (BMI) at LT associated with the lowest risks of posttransplant mortality by MELD category. Methods. A retrospective cohort of patients aged 18 years or older from the Organ Procurement and Transplantation Network database undergoing LT between February 27, 2002, and December 31, 2013, was identified and followed up through March 14, 2014. Patients' MELD score at the time of transplantation was categorized into 10 or lower (MELD1), 11 to 18 (MELD2), 19 to 24 (MELD3), and 25 or higher (MELD4). Multivariable adjusted Cox proportional hazard analyses were conducted. Results. Among 48 226 patients in the analytic cohort (14.8% were in MELD1, 33.7% were in MELD2, 19.6% were in MELD3, and 32.0% were in MELD4), 25% died with mean follow-up of 1371 days. For MELD1, patient BMI ranging from 30 to 33 was associated with a better survival outcome than BMI less than 30 or 33 or greater; for MELD2, BMI ranging from 28 to 37 had a better survival outcome than BMI less than 28 or 37 or greater; for MELD3, the survival outcome improved with an increasing BMI; for MELD4, the survival outcome was not associated with patient BMI. Conclusions. This study provides evidence that obesity in LT patients is not necessarily associated with higher posttransplantation mortality and highlights the importance of the interaction between BMI and MELD category to determine their survival likelihood.
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- 2017
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