36 results on '"Michael Ghadimi"'
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2. Onkologische Chirurgie im interdisziplinären Kontext – auf dem Weg zur personalisierten Medizin
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Lena-Christin Conradi and Michael Ghadimi
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Surgery - Published
- 2022
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3. Treatment recommendation and care in traumatic rupture of the spleen
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Stina Schild-Suhren, Anne-Christine Zygmunt, Lorenz Biggemann, Ali Seif Amir Hosseini, Michael Ghadimi, and Florian Bösch
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- 2023
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4. Long-term survivors need a good perspective
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Michael Ghadimi
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General Medicine - Published
- 2023
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5. Schnittstellen zwischen Innovation und Versorgung
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Michael Ghadimi
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- 2022
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6. Assessment of esophagogastric junction morphology by dynamic real-time MRI: comparison of imaging features to high-resolution manometry
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Lorenz Biggemann, Johannes Uhlig, Nina Gliem, Omar Al-Bourini, Edris Wedi, Volker Ellenrieder, Michael Ghadimi, Martin Uecker, Jens Frahm, Joachim Lotz, Ali Seif Amir Hosseini, and Ulrike Streit
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Adult ,Male ,Manometry ,Gastroesophageal Reflux ,Humans ,Female ,Radiology, Nuclear Medicine and imaging ,Esophagogastric Junction ,Middle Aged ,Magnetic Resonance Imaging ,Aged ,Retrospective Studies - Abstract
Purpose To assess the esophagogastric junction (EGJ) on real-time MRI and compare imaging parameters to EGJ morphology on high-resolution manometry (HRM). Methods A total of 105 of 117 eligible patients who underwent real-time MRI and high-resolution manometry for GERD-like symptoms between 2015 and 2018 at a single center were retrospectively evaluated (male n = 57; female n = 48; mean age 52.5 ± 15.4 years). Real-time MRI was performed at a median investigation time of 15 min (1 frame/40 ms). On HRM, EGJ morphology was assessed according to the Chicago classification of esophageal motility disorders. Real-time MRI was performed at 3 T using highly undersampled radial fast low-angle shot acquisitions with NLINV image reconstruction. A 10 mL pineapple juice bolus served as oral contrast agent at supine position. Real-time MRI films of the EGJ were acquired during swallowing events and during Valsalva maneuver. Anatomic and functional MRI parameters were compared to EGJ morphology on HRM. Results On HRM, n = 42 patients presented with EGJ type I (40.0%), n = 33 with EGJ type II (31.4%), and n = 30 with EGJ type III (28.6%). On real-time MRI, hiatal hernia was more common in patients with EGJ type III (66.7%) than in patients with EGJ type I (26.2%) and EGJ type II (30.3%; p p = 0.017). The mean esophagus–fundus angle of patients was 85 ± 31° at rest and increased to 101 ± 36° during Valsalva maneuver. Conclusion Real-time MRI is a non-invasive imaging method for assessment of the esophagogastric junction. Real-time MRI can visualize dynamic changes of the EGJ during swallowing events.
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- 2021
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7. Einfluss der Molekularpathologie auf die onkologische Chirurgie des kolorektalen Karzinoms
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Stefanie Nöpel-Dünnebacke, Lena-Christin Conradi, Anke Reinacher-Schick, and Michael Ghadimi
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Gynecology ,medicine.medical_specialty ,Transplant surgery ,Colorectal cancer ,business.industry ,Circulating tumor DNA ,medicine ,Oncological surgery ,Surgery ,medicine.disease ,business - Abstract
Das kolorektale Karzinom (KRK) ist noch immer eine der haufigsten Krebserkrankungen und eines der auf molekularer Ebene am besten charakterisierten Malignome. Interdisziplinare sowie multimodale Behandlungsstrategie sollten favorisiert werden; neben der chirurgischen Resektion in lokalisierten Stadien sowie Metastasenresektionen bei Oligometastasierung, der neoadjuvanten Chemo‑/Strahlentherapie beim lokalisierten Rektumkarzinom und der zytostatischen Therapie sollten auch zielgerichtete Behandlungsansatze berucksichtigt werden. Dieser Uberblick stellt etablierte und neue prognostische sowie auch pradiktive molekulare Marker des (metastasierten) KRK dar und beschreibt diese als zielgerichtete Behandlungsoptionen. Die Bestimmung der Mikrosatelliteninstabilitat (MSI-H) hat einen therapeutischen Einfluss in der Planung der adjuvanten sowie nun auch in der Therapie des metastasierten KRK (mKRK). Daruber hinaus stellt zirkulierende Tumor-DNA einen aussichtsreichen Marker hinsichtlich eines Rezidivs sowohl bei fruhen als auch fortgeschrittenen Erkrankungsstadien dar. Beim mKRK ist neben der Tumorlokalisation und dem RAS- und BRAF-Mutationsstatus auch eine MSI‑H in Bezug auf die Behandlungsstrategie von Bedeutung und sollte vor Beginn der Erstlinientherapie bestimmt werden. Gezielte Interventionen auf immunologischer oder molekularer Ebene werden durch neue medikamentose Ansatze ermoglicht. Durch nun etablierte Analysen auf molekulare Ebene nimmt das Verstandnis des KRK als heterogene Erkrankung zu, generiert jedoch ebenfalls eine Vielzahl an Hypothesen, die in Bezug auf ihre klinische Bedeutung weiterer Evaluation bedurfen. Besondere Aufmerksamkeit kommt Patienten mit hereditaren Syndromen zu, bei denen neben einem fruhen Erkrankungsalter individuelle und familiare Konsequenzen zu berucksichtigen sind.
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- 2021
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8. Specialization, cooperation and netzwork structures as a perspective
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Michael Ghadimi
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General Medicine - Published
- 2023
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9. RNF20 and RNF40 regulate vitamin D receptor-dependent signaling in inflammatory bowel disease
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Zhenqing Ye, Robyn Laura Kosinsky, William A. Faubion, Steven A. Johnsen, Maria Zerche, Jessica Friton, Ana C. de A. P. Schwarzer, Asha Nair, Ana P. Kutschat, Maximilian von Heesen, Zhifu Sun, Florian Wegwitz, Rodney D. Newberry, Nadia Paglilla, Michael Ghadimi, R. Balfour Sartor, Shehzad Z. Sheikh, and Dominik Saul
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Ubiquitin-Protein Ligases ,Inflammation ,Biology ,Calcitriol receptor ,Inflammatory bowel disease ,Article ,Mice ,Cell Line, Tumor ,Histone post-translational modifications ,Gene expression ,medicine ,Animals ,Humans ,Monoubiquitination ,Epigenetics ,Molecular Biology ,Gastrointestinal diseases ,Cell Proliferation ,Chronic inflammation ,Cell Biology ,Inflammatory Bowel Diseases ,medicine.disease ,digestive system diseases ,Experimental models of disease ,Cancer research ,Receptors, Calcitriol ,H3K4me3 ,medicine.symptom ,Protein Processing, Post-Translational ,Chromatin immunoprecipitation ,Signal Transduction - Abstract
Despite the identification of several genetic factors linked to increased susceptibility to inflammatory bowel disease (IBD), underlying molecular mechanisms remain to be elucidated in detail. The ubiquitin ligases RNF20 and RNF40 mediate the monoubiquitination of histone H2B at lysine 120 (H2Bub1) and were shown to play context-dependent roles in the development of inflammation. Here, we aimed to examine the function of the RNF20/RNF40/H2Bub1 axis in intestinal inflammation in IBD patients and mouse models. For this purpose, intestinal sections from IBD patients were immunohistochemically stained for H2Bub1. Rnf20 or Rnf40 were conditionally deleted in the mouse intestine and mice were monitored for inflammation-associated symptoms. Using mRNA-seq and chromatin immunoprecipitation (ChIP)-seq, we analyzed underlying molecular pathways in primary intestinal epithelial cells (IECs) isolated from these animals and confirmed these findings in IBD resection specimens using ChIP-seq.The majority (80%) of IBD patients displayed a loss of H2Bub1 levels in inflamed areas and the intestine-specific deletion of Rnf20 or Rnf40 resulted in spontaneous colorectal inflammation in mice. Consistently, deletion of Rnf20 or Rnf40 promoted IBD-associated gene expression programs, including deregulation of various IBD risk genes in these animals. Further analysis of murine IECs revealed that H3K4me3 occupancy and transcription of the Vitamin D Receptor (Vdr) gene and VDR target genes is RNF20/40-dependent. Finally, these effects were confirmed in a subgroup of Crohn’s disease patients which displayed epigenetic and expression changes in RNF20/40-dependent gene signatures. Our findings reveal that loss of H2B monoubiquitination promotes intestinal inflammation via decreased VDR activity thereby identifying RNF20 and RNF40 as critical regulators of IBD.
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- 2021
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10. Unser Gesundheitswesen braucht Veränderungen
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Michael Ghadimi
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- 2023
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11. Personalmanagement und Leadership in der Chirurgie
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Michael Ghadimi and Marian Grade
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Gynecology ,03 medical and health sciences ,medicine.medical_specialty ,0302 clinical medicine ,Transplant surgery ,Cardiothoracic surgery ,business.industry ,030220 oncology & carcinogenesis ,medicine ,Surgery ,030230 surgery ,business - Abstract
Das deutsche Gesundheitswesen und insbesondere chirurgische Kliniken stehen aufgrund eines zunehmenden Fachkraftemangels vor erheblichen Herausforderungen. Dieser Mangel an qualifiziertem Personal fuhrt nicht nur zu Einschrankungen in der Patientenversorgung, sondern wirkt sich auch negativ auf die Mitarbeitergesundheit aus, da das vorhandene Personal den Ausfall entsprechend kompensieren muss. Verstarkt wird diese Situation durch die Anspruche und Erwartungen neuer Mitarbeitergenerationen, die vor allem Bereiche wie Fuhrung, Arbeitszeit sowie Vereinbarkeit von Familie und Beruf betreffen. Diese Veranderungen werden zwangslaufig zu einem Umdenken von Klinikleitung und Geschaftsfuhrung fuhren mussen, um zukunftig die Funktionsfahigkeit und Qualitat der medizinischen Versorgung durch Kliniken aufrechterhalten zu konnen. Das Ziel dieser Arbeit ist eine personliche Einschatzung der aktuellen und zukunftigen Situation chirurgischer Kliniken in Deutschland mit einem Fokus auf Personalmanagement und Leadership.
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- 2021
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12. Klinische Komplettremission beim Rektumkarzinom: Wann ist weniger mehr?
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Emmanouil Fokas, Markus Diefenhardt, Cihan Gani, Michael Ghadimi, Claus Rödel, and Ralf-Dieter Hofheinz
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Gynecology ,021110 strategic, defence & security studies ,medicine.medical_specialty ,business.industry ,05 social sciences ,050602 political science & public administration ,0211 other engineering and technologies ,Medicine ,02 engineering and technology ,business ,0506 political science - Abstract
Nach neoadjuvanter Radiochemotherapie (RCT) wird bei 10–20 % der Patienten mit lokal fortgeschrittenem Rektumkarzinom eine pathologische Komplettremission nachgewiesen. Kann bei selektionierten Patienten mit klinisch exzellentem Tumoransprechen nach RCT auf eine radikale Operation im Sinne einer Watch-and-wait(W&W)-Strategie verzichtet werden? Die vorliegende Studie beinhaltet die Auswertung populationsbezogener Datensammlungen sowie prospektiver klinischer Studien zum Organerhalt nach RCT. Bei Standard-RCT und Restaging nach ca. 6 bis 8 Wochen mittels Rektoskopie und MRT zeigen sich klinische Komplettremissionen in einer Grosenordnung von 10–20 %. Bei Verzicht auf eine radikale Operation fur diese selektionierte Subgruppe mit biologisch hochresponsiven Tumoren ist bei engmaschiger Nachsorge ein lokales Tumorwiederwachstum innerhalb der ersten beiden Jahre in 20–30 % zu erwarten. Dieses Wiederwachstum ist in >90 % der Falle luminal detektierbar, auf die Darmwand begrenzt und einer kurativen Salvage-Operation zuganglich. Derzeit werden intensivierte RCT-Regime getestet. Studien zur totalen neoadjuvanten Therapie (TNT) zeigen signifikant erhohte Komplettremissionsraten, ein verbessertes krankheitsfreies Uberleben, und mogen richtungsweisend fur das Konzept des selektiven Organerhalts sein. Es bedarf weiterer prospektiver Studien mit ausreichenden Patientenzahlen und Nachbeobachtungszeiten, um die onkologische Sicherheit sowie das Risiko-Nutzen-Verhaltnis fur Patienten, die sich fur eine W&W-Option entscheiden, einzuordnen.
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- 2020
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13. R0 resection following chemo (radio)therapy improves survival of primary inoperable pancreatic cancer patients. Interim results of the German randomized CONKO-007± trial
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Uwe A. Wittel, A Pirkl, Werner Hohenberger, Stefan Boeck, Ulf P. Neumann, Helmut Oettle, Anke Reinacher-Schick, Roland S. Croner, L. Jacobasch, Sabine Semrau, Henriette Golcher, Ludwig Keilholz, Rainer Fietkau, Robert Grützmann, Michael Ghadimi, Waldemar Uhl, Sandra Rutzner, Werner Adler, Wolf O. Bechstein, D. Imhoff, and Dorota Lubgan
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medicine.medical_specialty ,FOLFIRINOX ,medicine.medical_treatment ,Prospective randomized multicenter trial ,law.invention ,03 medical and health sciences ,0302 clinical medicine ,Randomized controlled trial ,law ,Pancreatic cancer ,medicine ,Humans ,Radiology, Nuclear Medicine and imaging ,ddc:610 ,030212 general & internal medicine ,Chemotherapy ,business.industry ,Induction chemotherapy ,Chemoradiotherapy ,medicine.disease ,Interim analysis ,Gemcitabine ,Surgery ,Neoadjuvant chemoradiotherapy ,Pancreatic Neoplasms ,Radiation therapy ,Tumor resectability ,Oncology ,030220 oncology & carcinogenesis ,Original Article ,business ,Pancreatic adenocarcinoma ,medicine.drug - Abstract
Purpose Chemotherapy with or without radiotherapy is the standard in patients with initially nonmetastatic unresectable pancreatic cancer. Additional surgery is in discussion. The CONKO-007 multicenter randomized trial examines the value of radiotherapy. Our interim analysis showed a significant effect of surgery, which may be relevant to clinical practice. Methods One hundred eighty patients received induction chemotherapy (gemcitabine or FOLFIRINOX). Patients without tumor progression were randomized to either chemotherapy alone or to concurrent chemoradiotherapy. At the end of therapy, a panel of five independent pancreatic surgeons judged the resectability of the tumor. Results Following induction chemotherapy, 126/180 patients (70.0%) were randomized to further treatment. Following study treatment, 36/126 patients (28.5%) underwent surgery; (R0: 25/126 [19.8%]; R1/R2/Rx [n = 11/126; 6.1%]). Disease-free survival (DFS) and overall survival (OS) were significantly better for patients with R0 resected tumors (median DFS and OS: 16.6 months and 26.5 months, respectively) than for nonoperated patients (median DFS and OS: 11.9 months and 16.5 months, respectively; p = 0.003). In the 25 patients with R0 resected tumors before treatment, only 6/113 (5.3%) of the recommendations of the panel surgeons recommended R0 resectability, compared with 17/48 (35.4%) after treatment (p Conclusion Tumor resectability of pancreatic cancer staged as unresectable at primary diagnosis should be reassessed after neoadjuvant treatment. The patient should undergo surgery if a resectability is reached, as this significantly improves their prognosis.
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- 2020
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14. Chirurgische Therapie des Ösophaguskarzinoms – Qualitätsindikatoren für Diagnostik und Therapie
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Qualitätskommission der Deutschen Gesellschaft für Allgemein und Viszeralchirurgie, Heinz J Buhr, Dietmar Lorenz, Christiane Bruns, Michael Ghadimi, Ines Gockel, Patrick Sven Plum, and Jens Hoeppner
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Gynecology ,medicine.medical_specialty ,business.industry ,Esophageal cancer ,medicine.disease ,03 medical and health sciences ,0302 clinical medicine ,Transplant surgery ,Cardiothoracic surgery ,030220 oncology & carcinogenesis ,medicine ,030211 gastroenterology & hepatology ,Surgery ,Surgical treatment ,business ,Abdominal surgery - Abstract
Zusammenfassung Hintergrund Im Rahmen der Qualitätsinitiative der Deutschen Gesellschaft für Allgemein- und Viszeralchirurgie (DGAV) wurde eine Übersichtsarbeit auf der Grundlage einer systematischen Literatursuche verfasst und Empfehlungen für die aktuelle Diagnostik und Therapie des Ösophaguskarzinoms erarbeitet. Methoden Die systematische Literatursuche erfolgte gemäß den PRISMA-Kriterien unter Verwendung der MEDLINE-Datenbank und wurde im März 2019 durchgeführt. Die Empfehlungen wurden auf der Grundlage von Abstimmungen in der DGAV formuliert. Ergebnisse und Schlussfolgerung Operationen unterhalb der derzeit gültigen Mindestmenge sollten nicht mehr durchgeführt werden. Es spricht vieles dafür, die Mindestmenge in Deutschland auf ≥20 Resektionen/Jahr/Krankenhaus anzuheben, um die Qualität flächendeckend zu verbessern. Prähabilitationsprogramme mit Ausdauer‑, Kraft- und intensivem Atemtraining und Ernährungstherapie verbessern das Patientenoutcome. Die aktuelle Therapie des Ösophaguskarzinoms erfolgt stadienabhängig und umfasst die endoskopische Resektion bei (sub‑)mukosalen Low-risk-Tumoren (T1m1–3 bzw. T1sm1 „low risk“), die primäre Ösophagektomie bei submukosalen High-risk-Tumoren (T1a), Submukosakarzinomen (T1sm2–3) und T2N0-Tumoren, die multimodale Therapie mittels neoadjuvanter Radiochemotherapie bzw. perioperativer Chemotherapie und Operation bei fortgeschrittenen Befunden. Die Ösophagektomie wird gegenwärtig einzeitig als sog. Hybridverfahren (Laparoskopie und muskelschonende Thorakotomie) oder als total minimal-invasive Operation (Laparoskopie und Thorakoskopie) durchgeführt.
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- 2020
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15. Aktuelle Entwicklungen und Anwendungsgebiete von roboterassistierten Operationsverfahren
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Lena-Christin Conradi, Thomas E. Becker, Jan Hendrik Egberts, and Michael Ghadimi
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Gynecology ,021110 strategic, defence & security studies ,medicine.medical_specialty ,business.industry ,05 social sciences ,050602 political science & public administration ,0211 other engineering and technologies ,Medicine ,02 engineering and technology ,business ,0506 political science - Abstract
Roboterassistierte Operationssysteme („robotically assisted surgical systems“, RASS) haben sich uber die letzten 20 Jahre rasant weiterentwickelt und zunehmend Einzug in die klinische Praxis erhalten, insbesondere auch in der onkologischen Chirurgie. Die Vorteile der konventionellen laparoskopischen Chirurgie fur den Patienten, wie ein sehr geringes operatives Trauma durch die Zugangswege und eine verkurzte Rekonvaleszenz, werden durch RASS noch erweitert mithilfe technischer Innovationen und deutlich verbesserter Bedingungen fur den Operateur hinsichtlich Ergonomie und Sichtfeld. Gleichzeitig bleiben die RASS Gegenstand kritischer Diskussionen angesichts ihres aktuell noch bestehenden Kostenaufwands bei – in manchen Indikationen – noch fehlender Evidenz fur ihre Uberlegenheit. Diese Ubersicht zeigt die Anwendungsgebiete und die aktuellen Entwicklungen von RASS und beleuchtet Indikationen aus dem Bereich der onkologischen Chirurgie hinsichtlich ihrer Evidenz.
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- 2020
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16. Role and qualitative requirements of magnetic resonance imaging for treatment planning in locally advanced rectal cancer—interdisciplinary recommendations
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Ulrike I. Attenberger, R.D. Hofheinz, Alexander Stein, Michael Ghadimi, Dirk Arnold, Anke Reinacher-Schick, Dominik Paul Modest, Thomas Seufferlein, Michael Geissler, Claus Rödel, S. Hegewisch-Becker, Sebastian Stintzing, Stefan Kasper, Gunnar Folprecht, Volker Heinemann, and Pompiliu Piso
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Gynecology ,03 medical and health sciences ,medicine.medical_specialty ,0302 clinical medicine ,Oncology ,business.industry ,030220 oncology & carcinogenesis ,Medizin ,Medicine ,business ,030215 immunology - Abstract
Die qualitatsgesicherte, pratherapeutische Bildgebung des lokal fortgeschrittenen Rektumkarzinoms mittels Magnetresonanztomographie ermoglicht eine optimale Planung der perioperativen Therapie dieses Tumors. Im vorliegenden Beitrag werden Qualitatskriterien der Magnetresonanztomographie sowie deren potenzielle therapeutische Implikation sowie laufende Studien der Deutschen Rektumkarzinom-Studiengruppe von einem multidisziplinaren Autorenteam dargestellt.
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- 2020
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17. Therapeutische Relevanz molekularer Marker beim kolorektalen Karzinom
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Michael Ghadimi, Anke Reinacher-Schick, Lena-Christin Conradi, and Stefanie Nöpel-Dünnebacke
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0301 basic medicine ,Gynecology ,03 medical and health sciences ,medicine.medical_specialty ,030104 developmental biology ,0302 clinical medicine ,Oncology ,business.industry ,030220 oncology & carcinogenesis ,medicine ,Hematology ,business - Abstract
Das kolorektale Karzinom (KRK) ist eine der haufigsten Krebserkrankungen und eines der auf molekularer Ebene am besten charakterisierten Malignome. Die Therapiestrategie sollte interdisziplinar und multimodal festgelegt werden; neben der chirurgischen Resektion in fruhen Stadien bzw. der Metastasenresektion bei Oligometastasierung, der neoadjuvanten Chemo‑/Strahlentherapie beim lokalisierten Rektumkarzinom und der zytotoxischen Therapie sollten auch zielgerichtete Therapieansatze berucksichtigt werden. Anhand einer selektiven Literaturrecherche und deren Auswertung werden molekulare Marker fur Prognose und Therapieansprechen beschrieben. Die Bestimmung der Mikrosatelliteninstabilitat (MSI-H) in fruhen Tumorstadien ist klinisch und in Leitlinien etabliert. Neben der zirkulierenden Tumor-DNA konnten Immunoscore, CMS-Klassifikation („consensus molecular subtypes“) und genetische Alterationen der Phosphoinositid-3-Kinase (PI3K) und CDX2 Einfluss auf Therapieentscheidungen gewinnen. Beim metastasierten KRK (mKRK) sind neben der Tumorlokalisation der RAS- und BRAF-Status mit therapieentscheidend und sollten vor Beginn der Erstlinientherapie bestimmt werden. Neue medikamentose Ansatze ermoglichen als Monotherapie oder in Kombination gezielte Interventionen auf immunologischer oder molekularer Ebene, z. B. mittels Checkpointinhibitoren (CI), Amplifikation von HER2 („human epidermal growth factor receptor 2“) und Fusionen der neurotrophen Tyrosinrezeptorkinase (NTRK). Molekulare Analysen und das Verstandnis des KRK als heterogene Erkrankung bedurfen in Bezug auf ihre klinische Bedeutung weiterer Evaluation. Bei Patienten mit hereditaren Syndromen sind neben einem fruhen Erkrankungsalter individuelle und familiare Konsequenzen zu berucksichtigen.
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- 2020
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18. State of the Art in der Therapie des Kolonkarzinoms
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Anke Reinacher-Schick, H. Bläker, K. Höffken, and Michael Ghadimi
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Radiation therapy ,medicine.medical_specialty ,Oncology ,Surgical oncology ,business.industry ,General surgery ,medicine.medical_treatment ,medicine ,Hematology ,business - Published
- 2021
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19. Hiatal hernias in patients with GERD-like symptoms: evaluation of dynamic real-time MRI vs endoscopy
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Jens Frahm, Annemarie Uhlig, Johannes Uhlig, Lorenz Biggemann, Joachim Lotz, Volker Ellenrieder, Edris Wedi, Thilo Sprenger, Ali Seif Amir Hosseini, Ulrike Streit, Martin Uecker, Dirk Voit, and Michael Ghadimi
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Male ,medicine.medical_specialty ,Valsalva Maneuver ,Endoscopy, Gastrointestinal ,030218 nuclear medicine & medical imaging ,Hiatal hernia ,03 medical and health sciences ,0302 clinical medicine ,Humans ,Medicine ,Radiology, Nuclear Medicine and imaging ,Hernia ,Aged ,Neuroradiology ,medicine.diagnostic_test ,business.industry ,Magnetic resonance imaging ,General Medicine ,Real-time MRI ,Middle Aged ,medicine.disease ,Magnetic Resonance Imaging ,digestive system diseases ,Endoscopy ,Hernia, Hiatal ,030220 oncology & carcinogenesis ,Dynamic contrast-enhanced MRI ,Gastroesophageal Reflux ,GERD ,Female ,Esophagogastric Junction ,Radiology ,business - Abstract
To assess the diagnostic potential of real-time MRI for assessment of hiatal hernias in patients with GERD-like symptoms compared to endoscopy.One hundred eight patients with GERD-like symptoms were included in this observational cohort study between 2015 and 2017. Real-time MRI was performed at 3.0 Tesla with temporal resolution of 40 ms, dynamically visualizing the esophageal transport of a pineapple juice bolus, its passage through the gastroesophageal junction, and functional responses during Valsalva maneuver. Hernia detection on MRI and endoscopy was calculated using contingency tables with diagnosis of hernia on either modality as reference.Of 108 patients, 107 underwent successful MRI without adverse events; 1 examination was aborted to inability to swallow pineapple juice in supine position. No perforation or acute bleeding occurred during endoscopy. Median examination time was 15 min. Eighty-five patients (79.4%) were diagnosed with hiatal hernia on either real-time MRI or endoscopy. Forty-six hernias were visible on both modalities. Seventeen hernias were evident exclusively on MRI, and 22 exclusively on endoscopy. Sixteen of the 63 MRI-detected hernias (25.4%) were detectable only during Valsalva maneuver, which were smaller compared to hernias at rest (median - 13.5 vs - 33.0 mm, p 0.001). Diagnostic accuracy for hernia detection was comparable for MRI and endoscopy (sensitivity 74% vs 80%, p = 0.4223; specificity 100% vs 100%, p 0.99).Real-time MRI is a fast and safe modality for assessment of the gastroesophageal junction, without radiation exposure or administration of gadolinium-based contrast media. Although MRI and endoscopy yield comparable diagnostic accuracy, dynamic MRI sequences are able to visualize hiatal hernias that were occult on static MRI sequences or endoscopy in a relevant number of cases.• Real-time MRI is a safe and fast imaging modality for examination of the gastroesophageal junction, combining anatomical and functional information for enhanced detection of hiatal hernias. • Real-time MRI and endoscopy yield comparably high diagnostic accuracy: real-time MRI visualizes hiatal hernias that were occult on endoscopy in a relevant number of patients; however, several hiatal hernias detected on endoscopy were occult on real-time MRI. • There is clinical potential of real-time MR imaging in patients with GERD-like symptoms and equivocal findings on endoscopy or pH-metry, for anatomical visualization in patients planned for surgical intervention, or those with suspected fundoplication failures.
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- 2019
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20. Real-time MRI for the dynamic assessment of fundoplication failure in patients with gastroesophageal reflux disease
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Alexander W. Beham, Martin Uecker, Thilo Sprenger, Ali Seif Amir Hosseini, Jens Frahm, Lorenz Biggemann, Michael Ghadimi, Dirk Voit, Johannes Uhlig, Joachim Lotz, Volker Ellenrieder, Annemarie Uhlig, and Ulrike Streit
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Adult ,Male ,medicine.medical_specialty ,Adolescent ,medicine.medical_treatment ,Fundoplication ,030218 nuclear medicine & medical imaging ,Young Adult ,03 medical and health sciences ,0302 clinical medicine ,Recurrence ,medicine ,Valsalva maneuver ,Humans ,Radiology, Nuclear Medicine and imaging ,Hernia ,Treatment Failure ,Aged ,Neuroradiology ,medicine.diagnostic_test ,business.industry ,Reflux ,Reproducibility of Results ,Magnetic resonance imaging ,General Medicine ,Real-time MRI ,Middle Aged ,medicine.disease ,Magnetic Resonance Imaging ,digestive system diseases ,Endoscopy ,Treatment Outcome ,030220 oncology & carcinogenesis ,Gastroesophageal Reflux ,Female ,Esophagogastric Junction ,Radiology ,business ,Esophagitis - Abstract
To assess the diagnostic potential of dynamic real-time MRI for fundoplication failure in patients with persistent or recurrent GERD-like (gastroesophageal reflux disease) complaints. Twenty-two consecutive patients (male n = 11; female n = 11; median age 59 years) with recurrent or persistent GERD-like symptom after fundoplication were enrolled between 2015 and 2017. Median duration of GERD-like symptoms was 21 months. Real-time MRI (3 Tesla) was performed at 40 ms temporal resolution using undersampled radial fast low-angle shot acquisitions with nonlinear inverse image reconstruction. MRI movies dynamically visualized bolus transit of pineapple juice through the gastroesophageal junction, position of the fundoplication wrap and recurring hernia or reflux during Valsalva maneuver. MRI results were compared to endoscopic findings. Real-time MRI was successfully completed in all patients without adverse events (average examination time 15 min). Morphological correlates for GERD-like symptoms were evident in 20 patients (90.1%) with gastric reflux in 19 cases. Nine patients (40.1%) had wrap disruption and recurrent gastric hernia. Wrap migration or telescoping hernia was detected in nine patients (40.1%). One patient presented with continued reflux despite intact fundoplication wrap. Esophageal dysmotility with delayed bolus passage was observed in one case. On endoscopy, gastric hernia or wrap disruption was diagnosed in seven cases, and esophagitis or Barret’s metaplasia in nine cases. Real-time MRI is a fast and safe modality for dynamic imaging after fundoplication, without radiation exposure or administration of gadolinium-based contrast media. In a relevant number of cases, real-time MRI reveals correlates for GERD-like symptoms. • Real-time MRI reliably visualizes the gastroesophageal junction after fundoplication surgery. • Patients with recurring GERD-like symptoms have a high rate of morphological failure patterns that can be identified by real-time MRI. • Dynamic assessment of gastroesophageal junction by real-time MRI is a perspective diagnostic tool for detection of fundoplication failure.
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- 2019
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21. Hepatic arterial infusion of irinotecan and EmboCept® S results in high tumor concentration of SN-38 in a rat model of colorectal liver metastases
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Jens Sperling, Thilo Sprenger, Anne Kauffels, Marie Kitzmüller, Anja Kuthning, Martin Czejka, Michael Ghadimi, Hannah Nowack, Hanibal Bohnenberger, Melanie Spitzner, and Andrea Gruber
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0301 basic medicine ,Cancer Research ,medicine.medical_specialty ,medicine.medical_treatment ,SN-38 ,Gastroenterology ,03 medical and health sciences ,chemistry.chemical_compound ,0302 clinical medicine ,Hepatic arterial infusion ,Surgical oncology ,Internal medicine ,medicine ,heterocyclic compounds ,Embolization ,neoplasms ,Active metabolite ,Hematology ,business.industry ,virus diseases ,General Medicine ,digestive system diseases ,Irinotecan ,030104 developmental biology ,Oncology ,chemistry ,Apoptosis ,030220 oncology & carcinogenesis ,business ,medicine.drug - Abstract
Intraarterial chemotherapy for colorectal liver metastases (CRLM) can be applied alone or together with embolization particles. It remains unclear whether different types of embolization particles lead to higher intratumoral drug concentration. Herein, we quantified the concentrations of CPT-11 and its active metabolite SN-38 in plasma, liver and tumor tissue after hepatic arterial infusion (HAI) of irinotecan, with or without further application of embolization particles, in a rat model of CRLM. Animals underwent either systemic application of irinotecan, or HAI with or without the embolization particles Embocept® S and Tandem™. Four hours after treatment concentrations of CPT-11 and SN-38 were analyzed in plasma, tumor and liver samples by high-performance liquid chromatography. Additionally, DNA-damage and apoptosis were analyzed immunohistochemically. Tumor tissue concentrations of SN-38 were significantly increased after HAI with irinotecan and EmboCept® S compared to the other groups. The number of apoptotic cells was significantly higher after both HAI with irinotecan and EmboCept® S or Tandem™ loaded with irinotecan compared to the control group. HAI with irinotecan and EmboCept® S resulted in an increased SN-38 tumor concentration. Both HAI with irinotecan and EmboCept® S or Tandem™ loaded with irinotecan were highly effective with regard to apoptosis.
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- 2019
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22. Langzeitfolgen onkologischer Behandlungen
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Michael Ghadimi and H. Schmidberger
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Gynecology ,medicine.medical_specialty ,Oncology ,business.industry ,medicine ,Hematology ,business - Published
- 2018
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23. Spätfolgen nach onkologischer Chirurgie
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Michael Ghadimi, Jens Sperling, and Maria Zerche
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Gynecology ,03 medical and health sciences ,medicine.medical_specialty ,0302 clinical medicine ,Oncology ,business.industry ,030220 oncology & carcinogenesis ,medicine ,030211 gastroenterology & hepatology ,Hematology ,business - Abstract
Die onkologische Chirurgie erfordert oft ausgedehnte und radikale Eingriffe, die mit einem breiten Spektrum moglicher operationsbedingter Spatfolgen einhergehen. Dieser Ubersichtsartikel soll wesentliche Spatfolgen onkologischer Chirurgie zusammenfassen und Praventions- und Therapieansatze aufzeigen. Beispielhaft werden Spatfolgen viszeralonkologischer Operationen am oberen und unteren Gastrointestinaltrakt sowie am Pankreas diskutiert. Es erfolgte eine selektive Literaturrecherche und Zusammenfassung der aktuellen Evidenz. Das Erreichen des bestmoglichen onkologischen Ergebnisses geht haufig mit einer erhohten postoperativen Morbiditat sowie bleibenden Funktionseinschrankungen und permanenten Einbusen der Lebensqualitat einher. Spatfolgen sind oft spezifisch fur den jeweiligen Eingriff, wobei chronische Schmerzsyndrome und eine eingeschrankte gesundheitsbezogene Lebensqualitat mit hoher Pravalenz organ- und eingriffsubergreifend auftreten. Haufige Spatfolgen nach onkologischer Chirurgie des oberen Gastrointestinaltrakts sind persistierende Beschwerden bei der Nahrungsaufnahme, postprandiale Storungen sowie respiratorische Einschrankungen. Nach Eingriffen am Pankreas steht aufgrund des Parenchymverlusts die endokrine- und exokrine Pankreasinsuffizienz im Vordergrund. Im Bereich des unteren Gastrointestinaltrakts sind persistierende Stuhlveranderungen, Defakationsprobleme, Anastomosen- und Stomakomplikationen sowie Storungen der Blasen- und Sexualfunktion von Relevanz. Herausforderung der onkologischen Chirurgie ist es, die Balance zwischen erforderlicher Radikalitat und postoperativer Morbiditat zu finden.
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- 2018
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24. The utilization of multidisciplinary tumor boards (MDT) in clinical routine: results of a health care research study focusing on patients with metastasized colorectal cancer
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Lena-Christin Conradi, Kathrin Stanek, Alexander Koenig, Claus Langer, Sven Detken, Tim Beissbarth, Markus Lowes, Rainer Lueck, Michael Ghadimi, Kia Homayounfar, Manuel Nietert, and Mathias Kleiss
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Adult ,Male ,Oncology ,Health care research ,medicine.medical_specialty ,Colorectal cancer ,medicine.medical_treatment ,Clinical Decision-Making ,Young Adult ,03 medical and health sciences ,Multidisciplinary tumor board ,0302 clinical medicine ,Germany ,Internal medicine ,Health care ,medicine ,Humans ,Neoplasm Metastasis ,Young adult ,Neoadjuvant therapy ,Aged ,Neoplasm Staging ,Metastasized colorectal cancer ,Aged, 80 and over ,Patient Care Team ,Rectal Neoplasms ,business.industry ,General surgery ,Metastasectomy ,Gastroenterology ,Health services research ,Guideline ,Middle Aged ,medicine.disease ,Primary tumor ,Neoadjuvant Therapy ,Chemotherapy, Adjuvant ,030220 oncology & carcinogenesis ,Colonic Neoplasms ,Practice Guidelines as Topic ,Female ,Interdisciplinary Communication ,Original Article ,030211 gastroenterology & hepatology ,Guideline Adherence ,Health Services Research ,business - Abstract
Purpose Multidisciplinary tumor boards (MDT) have been advocated as standard of care in modern oncology. German guidelines for metastasized colorectal cancer (mCRC) recommend MDT discussion of colon cancer patients after completion of primary tumor therapy but stage IV colon cancer as well as rectal cancer patients prior to any therapy. In this health care research study, we evaluated application and decisional consequences of this approach in clinical routine. Methods All major institutions providing oncological care in southern Lower Saxony and Northern Hesse (N = 11) were invited. Patients with mCRC diagnosed between 01/2011 and 12/2013 were eligible. Data were collected using a standardized patient report form and stored in a GCP-conform EDC-system (secuTrial®). Results A university medical center, four teaching hospitals, one communal hospital, and three oncological focus practices participated in the study. In total, 470 patients with a median age of 70 years were enrolled. Guideline conform MDT discussion was performed in 63% of operated colon cancer patients, 38% of stage IV colon cancer patients and 47% of rectal cancer patients, respectively. Resection of metastases was performed in 41% of cases. Patients ≥70 years (n = 250) received significantly more often treatment following MDT discussion (86 versus 64%, p = 0.0002). Not the resection rate (48 versus 57%, p = 0.1574) but indication for preoperative chemotherapy (57 versus 33%, p = 0.0056) significantly differed when patients with single organ metastases experienced MDT discussion. Conclusions MDT discussion is not as established as advocated by national guidelines. Treatment decisions differ especially in older patients and those with single organ metastases.
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- 2017
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25. Management der akuten Appendizitis
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Otto Kollmar, Jan E. Slotta, Michael Ghadimi, and U. Kopsch
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medicine.medical_specialty ,business.industry ,Perforation (oil well) ,030230 surgery ,Vascular surgery ,Surgery ,03 medical and health sciences ,0302 clinical medicine ,Transplant surgery ,Cardiothoracic surgery ,030220 oncology & carcinogenesis ,Acute appendicitis ,medicine ,Complication ,business ,Abdominal surgery - Abstract
Hintergrund Die akute Appendizitis ist eine haufige Erkrankung und bedarf einer zeitnahen chirurgischen Therapie des entzundlichen Fokus. Bisher gibt es jedoch keine verlasslichen Daten, wie viel Zeit zwischen Aufnahme des Patienten in die Klinik, Indikation zur Operation und chirurgischer Therapie ohne ein erhohtes Morbiditats- und Mortalitatsrisiko fur den Patienten vergehen darf.
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- 2016
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26. Lymphknotenmetastasen beim ypT1/2-Rektumkarzinom nach neoadjuvanter Radiochemotherapie
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Tim Beissbarth, Thilo Sprenger, Claus Rödel, Lena-Christin Conradi, H. Rothe, Anne Kauffels, Torsten Liersch, Michael Ghadimi, Kia Homayounfar, and C. L. Behnes
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03 medical and health sciences ,0302 clinical medicine ,business.industry ,030220 oncology & carcinogenesis ,Medicine ,Surgery ,030230 surgery ,business ,Nuclear medicine - Published
- 2016
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27. Kommunikation im Tumorboard
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Margarete Boos, Michael Ghadimi, Kia Homayounfar, Dorothea Mey, and Jochen Gaedcke
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Gynecology ,medicine.medical_specialty ,Political science ,medicine - Abstract
Die pratherapeutische Diskussion individueller Patientenfalle in einem multidisziplinar besetzten Tumorboard (MDT) hat sich zu einem internationalen Standard entwickelt. Die Notwendigkeit solcher MDT ergibt sich aus der zunehmenden Komplexitat der Behandlungsmodalitaten und hat zum Ziel, kosteneffektiv jedem Patienten Zugang zu den modernsten und effektivsten Therapien fur seine Erkrankung zu ermoglichen. Die MDT sind mit einem hohen personellen und logistischen Aufwand verbunden. Eine Vielzahl von Studien hat aber gezeigt, dass mit der interdisziplinaren Diskussion in MDT in einer Vielzahl der Falle eine tatsachlich veranderte Therapieempfehlung verbunden ist. Wahrend Aspekte wie effektive Teamstruktur und -leitung, Infrastruktur und Logistik wissenschaftlich untersucht worden sind, liegen kaum wissenschaftliche Daten zum Kommunikationsprozess in MDT und den zugrunde liegenden individuellen Kommunikationskompetenzen der beteiligten Fachvertreter vor. Aus der Kommunikationsforschung ist bekannt, dass heterogen zusammengesetzte Gruppen haufig nicht ausreichend Gebrauch von ihrem nominellen Wissensvorsprung machen. Situative und strukturelle Barrieren beeintrachtigen zusatzlich das Kommunikationsverhalten und damit die Entscheidungsgute. Unabhangige Moderatoren sowie Regeln fur den Kommunikationsprozess, die unter den Beteiligten Konsens sind, helfen diese Defizite abzumildern. Die Professionalisierung und Standardisierung von MDT in Bezug auf Struktur, Prozesse und Kommunikation wurde eine Vergleichbarkeit der Entscheidungen ermoglichen und dazu beitragen, die Qualitat messbar und entwicklungsfahig zu machen.
- Published
- 2015
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28. High-resolution analysis of DNA copy number alterations in rectal cancer
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Michael Ghadimi, Jérôme Doyen, Laetitia Marisa, Jochen Gaedcke, Aurélien de Reyniès, Marie-Christine Etienne-Grimaldi, Gérard Milano, Eric Letouzé, Sylviane Olschwang, and Jean-Pierre Gerard
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Adult ,Genetic Markers ,Male ,Oncology ,medicine.medical_specialty ,Candidate gene ,DNA Copy Number Variations ,Colorectal cancer ,medicine.medical_treatment ,Statistics as Topic ,Adenocarcinoma ,Metastasis ,Risk Factors ,Internal medicine ,Gene expression ,Prevalence ,Humans ,Medicine ,SNP ,Genes, Tumor Suppressor ,Genetic Predisposition to Disease ,Radiology, Nuclear Medicine and imaging ,RNA, Messenger ,Gene ,Aged ,Aged, 80 and over ,Rectal Neoplasms ,business.industry ,Chromosome ,Middle Aged ,medicine.disease ,Survival Rate ,Radiation therapy ,Treatment Outcome ,Mutation ,Female ,business - Abstract
This study aimed to determine the candidate genes and chromosomal imbalances capable of predicting occurrences of metastasis in patients with rectal cancer. Fresh frozen tumor tissues from 80 patients with rectal cancer were prospectively collected and analyzed using Affymetrix HG-U133 Plus 2.0 gene expression arrays and high-resolution Illumina single-nucleotide polymorphism (SNP) arrays. Endpoints of the study were metastasis-free survival (MFS) and cancer-specific survival (CSS). The median follow-up was 102 months (1–146). Deletions of 8p and 1p36-35 correlated with worse MFS (p = 0.005 and p = 0.01, respectively) and CSS (p = 0.001 and p = 0.01, respectively). Multivariate analysis identified 8p deletion as an independent prognostic factor for MFS (p = 0.04) and CSS (p = 0.003); 97 genes located on the 8p chromosome were significantly underexpressed in tumors with 8p deletion. This study shows for the first time in rectal cancer an independent correlation of 8p deletion with MFS and CSS and highlights potential new tumor suppressor genes.
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- 2014
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29. Rolle und Aufgaben der chirurgischen Onkologie im Rahmen molekular definierter Therapien
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Peter M. Schlag, J. Gaedcke, and Michael Ghadimi
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Gynecology ,medicine.medical_specialty ,Oncology ,business.industry ,Medicine ,Hematology ,business - Abstract
Hintergrund Die fortschreitende Entwicklung molekularbiologischer Analysen ermoglicht den zunehmenden schnellen klinischen Einsatz von Biomarkern. Eingebettet in multimodale Therapiekonzepte ist es auch Aufgabe des Chirurgen, pradiktive, prognostische und therapeutische Biomarker zu verstehen und fur die Behandlungsstrategie zu berucksichtigen. Dies ist ein wichtiger Baustein in einer auf den Patienten zugeschnittenen modernen Tumortherapie.
- Published
- 2013
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30. Diagnostic evaluation, surgical technique, and perioperative management after esophagectomy: consensus statement of the German Advanced Surgical Treatment Study Group
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Heinz Becker, Β. Michael Ghadimi, M. Betzler, Franz G. Bader, Katja Ott, Norbert Senninger, Daniel Palmes, Hans-Detlev Saeger, Stefan Post, Hans-Peter Bruch, Heinz J. Buhr, R. Konopke, Ulrich T. Hopt, Jörg-Peter Ritz, Matthias Brüwer, Markus W. Büchler, and Ulrich Ronellenfitsch
- Subjects
medicine.medical_specialty ,Consensus ,Palliative care ,Delphi Technique ,Esophageal Neoplasms ,medicine.medical_treatment ,Germany ,medicine ,Humans ,Perioperative Period ,Neoadjuvant therapy ,Neoplasm Staging ,business.industry ,Patient Selection ,General surgery ,Palliative Care ,Perioperative ,Vascular surgery ,Esophageal cancer ,Prognosis ,medicine.disease ,Neoadjuvant Therapy ,Esophagectomy ,Cardiothoracic surgery ,Surgery ,business ,Abdominal surgery - Abstract
Correct diagnosis, surgical treatment, and perioperative management of patients with esophageal carcinoma remain crucial for prognosis within multimodal treatment procedures. This study aims to achieve a consensus regarding current management strategies in esophageal cancer by questioning a panel of experts from the German Advanced Surgical Treatment Study (GAST) group, comprised of 9 centers specialized in esophageal surgery, with a combined total of >220 esophagectomies per year. The Delphi method, a systematic and interactive, evidence-based approach, was used to obtain consensus statements from the GAST group regarding ambiguities and disparities in diagnosis, patient selection, surgical technique, and perioperative management of patients with esophageal carcinoma. After four rounds of surveys, agreement was measured by Likert scales and defined as full (100% agreement), near (≥66.6% agreement), or no consensus (
- Published
- 2011
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31. Induction Chemotherapy before Chemoradiotherapy and Surgery for Locally Advanced Rectal Cancer
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Ralf Hofheinz, Claus Rödel, Rainer Fietkau, F. Wenz, Torsten Liersch, Rudolf Raab, Ullrich Graeven, Rolf Sauer, Stefan Post, Michael Ghadimi, Heinz Becker, Werner Hohenberger, Dirk Arnold, and Clemens F. Hess
- Subjects
medicine.medical_specialty ,Colorectal cancer ,medicine.medical_treatment ,Clinical Trials, Phase II as Topic ,Antineoplastic Combined Chemotherapy Protocols ,medicine ,Humans ,Radiology, Nuclear Medicine and imaging ,Neoplasm Staging ,Randomized Controlled Trials as Topic ,Chemotherapy ,Rectal Neoplasms ,business.industry ,Rectum ,Induction chemotherapy ,Combination chemotherapy ,medicine.disease ,Combined Modality Therapy ,Total mesorectal excision ,Neoadjuvant Therapy ,Surgery ,Radiation therapy ,Clinical Trials, Phase III as Topic ,Oncology ,Chemotherapy, Adjuvant ,Disease Progression ,Feasibility Studies ,Radiotherapy, Adjuvant ,Fluorouracil ,business ,Adjuvant ,Chemoradiotherapy - Abstract
In the era of preoperative chemoradiotherapy (CRT) and total mesorectal excision (TME), the development of distant metastases is the predominant mode of failure in rectal cancer patients today. Integrating more effective systemic therapy into combined modality programs is the challenge. The question that needs to be addressed is how and when to apply systemic treatment with adequate dose and intensity. This review article focuses on phase II–III trials designed to improve 5-fluorouracil (5-FU)-based combined modality treatment for rectal cancer patients through the inclusion of concurrent, adjuvant or, most recently, induction combination chemotherapy. Computerized bibliographic searches of PubMed were supplemented with hand searches of reference lists and abstracts of ASCO/ASTRO/ESTRO meetings. After preoperative CRT and surgical resection, approximately one third of patients do not receive adjuvant chemotherapy, mainly due to surgical complications, patients’ refusal, or investigator’s discretion. In order to be able to apply chemotherapy with sufficient dose and intensity, an innovative approach is to deliver systemic therapy prior to preoperative CRT rather than adjuvant chemotherapy. Emerging evidence from several phase II trials and, recently, randomized phase II trials indicate that induction chemotherapy is feasible, does not compromise CRT or surgical resection, and enables the delivery of chemotherapy in adequate dose and intensity. Although this approach did not increase local efficacy in recent trials (e.g., pathological complete response rates, tumor regression, R0 resection rates, local control), it may help to improve control of distant disease. Whether this improvement in applicability and dose density of chemotherapy will ultimately translate into improved disease-free survival will have to be tested in a larger phase III trial.
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- 2010
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32. Preoperative Chemoradiotherapy Does Not Necessarily Reduce Lymph Node Retrieval in Rectal Cancer Specimens—Results from a Prospective Evaluation with Extensive Pathological Work-up
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Tim Beissbarth, B. Michael Ghadimi, Kia Homayounfar, Torsten Liersch, H. Rothe, Heinz Becker, and Thilo Sprenger
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Adult ,Male ,Antimetabolites, Antineoplastic ,medicine.medical_specialty ,Colorectal cancer ,medicine.medical_treatment ,Preoperative chemoradiotherapy ,Adenocarcinoma ,03 medical and health sciences ,0302 clinical medicine ,medicine ,Humans ,Locally advanced rectal cancer ,Total mesorectal excision ,Pathologic diagnostics ,Prospective cohort study ,Lymph node ,Neoadjuvant therapy ,Aged ,Mesorectal ,Aged, 80 and over ,Rectal Neoplasms ,business.industry ,Gastroenterology ,Middle Aged ,medicine.disease ,Neoadjuvant Therapy ,Medicine & Public Health ,Surgery ,3. Good health ,medicine.anatomical_structure ,Lymphatic Metastasis ,030220 oncology & carcinogenesis ,Lymph Node Excision ,Original Article ,Female ,030211 gastroenterology & hepatology ,Fluorouracil ,Lymph Nodes ,Lymph ,Radiology ,business - Abstract
Purpose Preoperative chemoradiotherapy (CRT) is supposed not only to reduce lymph node metastases but also lymph node recovery in rectal cancer specimens. The objective of this prospective study was to determine the effects of chemoradiation on mesorectal lymph node retrieval under terms of a meticulous histopathological evaluation. Methods Specimens from 64 consecutive patients with stage II/III rectal cancer receiving preoperative 5-FU-based CRT were investigated. All patients were treated within the German Rectal Cancer Trial CAO/ARO/AIO-04. After surgery (including quality assessed total mesorectal excision), extensive pathological diagnostics was performed with embedding and microscopic evaluation of the whole mesorectal soft tissue compartment. Results A total number of 2,021 lymph nodes were recovered (31.6 per specimen) within pathological work-up. There was no significant correlation between the number of retrieved nodes and patient- as well as tumor-dependent parameters. Lymph node size constantly amounted for less than 0.5 cm. Twenty patients (31.3%) had persistent nodal metastases. A considerable incidence of residual micrometastatic involvement in lymph nodes
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- 2009
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33. Gold markers for tumor localization and target volume delineation in radiotherapy for rectal cancer
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Hans Christiansen, Clemens F. Hess, H. Rothe, Robert Michael Hermann, Hilke Vorwerk, Thorsten Liersch, and Michael Ghadimi
- Subjects
Male ,medicine.medical_specialty ,Colorectal cancer ,medicine.medical_treatment ,Tumor resection ,Planning target volume ,Locally advanced ,Contrast Media ,medicine ,Humans ,Radiology, Nuclear Medicine and imaging ,Radiation treatment planning ,Aged ,Mesorectal ,Rectal Neoplasms ,business.industry ,Gold marker ,medicine.disease ,Radiotherapy, Computer-Assisted ,Surgery ,Radiographic Image Enhancement ,Radiation therapy ,Treatment Outcome ,Oncology ,Female ,Gold ,Radiology ,Tomography, X-Ray Computed ,business - Abstract
In locally advanced rectal cancer, neoadjuvant radiochemotherapy is indicated. To improve target volume definition for radiotherapy planning, the potential of implanted gold markers in the tumor region was evaluated. In nine consecutive patients, two to three gold markers were implanted in the tumor region during rigid rectoscopy. Computed tomography scans were performed during treatment planning. All electronic portal imaging devices (EPIDs) recorded during treatment series were analyzed. All patients underwent complete tumor resection with meticulous histopathologic examination. The gold markers could easily be implanted into the mesorectal tissue at the caudal tumor border without any complications. They were helpful in identifying the inferior border of the planning target volume in order to spare normal tissue (in particular anal structures). No significant shift of the markers was found during the course of therapy. Marker matching of the EPIDs did not improve patient positioning in comparison to bone structure matching. The former position of at least one marker could be identified in all patients during histopathologic examination. The use of gold marker enables a more precise definition of the target volume for radiotherapy in patients with rectal cancer. This could eventually allow a better protection of anal structures of patients with a tumor localization ≥ 5 cm cranial of the anal sphincter. The implantation of the gold markers improved communication between the surgeon, the radiooncologist and the pathologist resulting in intensified exchange of relevant informations.
- Published
- 2009
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34. Zum kanzerogenen Potenzial von Biomaterialien in der Hernienchirurgie
- Author
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B. Michael Ghadimi, H. D. Becker, and Claus Langer
- Subjects
Gynecology ,medicine.medical_specialty ,Transplant surgery ,Cardiothoracic surgery ,business.industry ,medicine ,Surgery ,business - Abstract
In den U.S.A. und Westeuropa werden zur Versorgung sowohl von Narben- als auch Leistenhernien Kunststoffnetze implantiert. Die Kurzzeit- und Langzeitergebnisse von Kunststoffnetzen bezuglich der Komplikationsrate, Rezidivfreiheit und des Patientenkomforts sind uberzeugend. Ein potentielles Karzinogeneserisiko von Biomaterialien wird von einigen Arbeitsgruppen diskutiert. Es existieren experimentelle Ansatze bei denen in der Tat durch die Implantation unterschiedlichster Fremdmaterialien (z.B. Kunststoffe und Metalle) bei Mausen und Ratten Weichgewebssarkome induziert werden konnen. Beim Menschen allerdings ist trotz millionenfacher Verwendung von Kunststoffnetzen in der Hernienchirurgie bis zum heutigen Tag kein einziger Kasus beschrieben. Der Nachweis von Proliferationsmarkern, von Apoptose sowie der Modulation von Heat-Shock Proteinen bei Netzimplantaten erscheint nicht ausreichend um das Karzinogeneserisiko im Zusammenhang mit Kunsstoffnetzen einschatzen zu konnen.
- Published
- 2002
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35. Acute gastrointestinal bleeding due to oesophageal varices: an unusual case of a thoracic spleen
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Friedrich A. Schöndube, B. Michael Ghadimi, Alexander Emmert, Jens-Gerd Scharf, Gerrit Hagenah, and Bernhard C. Danner
- Subjects
medicine.medical_specialty ,medicine.medical_treatment ,Medicine & Public Health ,Pediatrics ,Pain Medicine ,Pneumology/Respiratory System ,Emergency Medicine ,Anesthesiology ,Intensive / Critical Care Medicine ,Accessory spleen ,Critical Care and Intensive Care Medicine ,030218 nuclear medicine & medical imaging ,03 medical and health sciences ,0302 clinical medicine ,Intensive care ,medicine.artery ,Correspondence ,Thoracoscopy ,Medicine ,Thoracotomy ,medicine.diagnostic_test ,business.industry ,medicine.disease ,3. Good health ,Venous thrombosis ,030228 respiratory system ,Upper gastrointestinal bleeding ,Radiology ,business ,Varices ,Bronchial artery - Abstract
Upper gastrointestinal bleeding is often seen in patients admitted to intensive care units. Ulcers are the most common cause of these haemorrhages, but other factors such as oesopageal varices or malignancy may also be sources [1]. We report a 36-year-old male patient (BMI \ 30 kg/m) admitted to hospital because of a first session of haematemesis and recurrent dyspnoea only days before. Patient’s history revealed only 15 years of nicotine abuse and an undefined infection episode 17 years ago. On admission, clinical examination, vital parameters, chest X-ray and ECG findings were unremarkable. Initial laboratory tests revealed no pathologic coagulation tests, but impaired hemoglobin levels (12.3 g/dl). An oesophagoscopy was performed and revealed varices grade 3 [2]. Nine consecutive ligatures were placed. Furthermore, since there was no history or ultrasonic findings of liver disease, a thoracic CT scan was performed, revealing a large retrocardial mass (12 9 12 9 6 cm, Fig. 1) between the main bronchi displacing the oesophagus. An endosonography excluded an infiltration of the oesophagus, and a pathological specimen taken by video-assisted thoracoscopy showed a vascularised tumor without malignancy. Meanwhile, an emergency oesophagoscopy was indicated due to another session of haematemesis with need for mass transfusion. In the following days, an anterolateral rightsided thoracotomy with tumor resection followed. The arterial delivery was provided by a number of bronchial arteries of both main bronchi. The cause of the paraoesophageal plexus varices was more likely the tumorous venous drainage than the compression by the tumour itself (Fig. 2). Histological examination and further immunohistochemical differentiation of the resected mass revealed an ectopic accessory spleen confirmed by a second, independent pathologist. A deep venous thrombosis occurred preoperatively promoted by lack of anticoagulation despite immobilization. Because postoperatively the thrombosis reached the pelvic vessels, a venous thrombectomy was also performed. The postoperative oesophagoscopy showed varices decreased to grade 2, and anticoagulation with coumadin was started.
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- 2009
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36. Gastrointestinal stromal tumors
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Beham, Alexander W., primary, Schaefer, Inga-Marie, additional, Schüler, Philipp, additional, Cameron, Silke, additional, and Michael Ghadimi, B., additional
- Published
- 2011
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