Search

Introduction: Large increases in joint range of motion (ROM) have been reported after eccentric resistance training; however, limited data exist describing the associated mechanisms or potential cross-education effects in the contralateral limb. Therefore, the effects of a 6-wk isokinetic eccentric plantarflexor training program were examined in 26 participants. Methods: Before and after the training program, dorsiflexion ROM, plantarflexor strength, and muscle-tendon unit (MTU) morphology and mechanics were measured in control (n = 13) and experimental (n = 13) young adult groups. Training consisted of 5 sets of 12 maximal isokinetic eccentric plantarflexor contractions twice weekly on the right limb. Results: Significant ( P < 0.05) increases in dorsiflexion ROM (4.0-9.5°), stretch tolerance (40.3-95.9%), passive elastic energy storage (47.5-161.3%), and isometric (38.1-40.6%) and eccentric (46.7-67.0%) peak plantarflexor torques were detected in both trained and contralateral limbs in the experimental group. Significant increases in gastrocnemiusmedialis and soleus thickness (5.4-6.1%), gastrocnemius medialis fascicle length (7.6 ± 8.5%), passive plantarflexor MTU stiffness (30.1 ± 35.5%), and Achilles tendon stiffness (5.3 ± 4.9%) were observed in the trained limb only. Significant correlations were detected between the changes in trained and contralateral limbs for dorsiflexion ROM (r = 0.59) and both isometric (r = 0.79) and eccentric (r = 0.73) peak torques. No significant changes in any metric were detected in the control group. Conclusions: Large ROM increases in the trained limb were associated with neurological, mechanical, and structural adaptations, with evidence of a cross-education effect in the contralateral limb being primarily driven by neurological adaptation (stretch tolerance). The large improvements in ROM, muscle size, and strength confirm that isokinetic eccentric training is a highly effective training tool, with potential for use in athletic and clinical populations where MTU function is impaired and current therapies are ineffective. [ABSTRACT FROM AUTHOR]

Despite national guidelines against contralateral prophylactic mastectomy (CPM) in low- to moderate-risk breast cancer, CPM use continues to rise. Breast reconstruction improves health-related quality of life and satisfaction among women undergoing mastectomy. Given the lack of data regarding factors associated with reconstruction after CPM and the known benefits of reconstruction, we sought to investigate whether disparities exist in receipt of reconstruction after CPM. The 2004-2017 National Cancer Database was queried to identify women diagnosed with breast cancer who underwent unilateral mastectomy with CPM. Patients were divided into two groups: those who underwent planned reconstruction at any timepoint and those who did not. A secondary analysis comparing types of reconstruction (tissue, implant, combined) was conducted. Patient, tumor, and demographic characteristics were analyzed using chi-square test and odds ratios were calculated using generalized estimating equations. The cohort included 1,73,249 women: 95,818 (55.3%) underwent reconstruction and 77,431 (45.7%) did not. Both the rate CPM and the proportion of women undergoing reconstruction after CPM increased between 2004 and 2017. Of the women who had reconstruction, 40,840 (51.7%) received implants, 29,807 (37.7%) had tissue, and 8352 (10.6%) had combined reconstruction. After adjusted analysis, factors associated with reconstruction were young age, Hispanic ethnicity, private insurance, and living in an area with the highest education and median income (P < 0.01). Patients who underwent reconstruction were less likely to have radiation (P < 0.01) and chemotherapy (P < 0.01), more likely to have stage I disease (P < 0.01), and to be treated at an integrated cancer center (P < 0.01). Reconstruction after CPM is disproportionately received by younger women, Hispanics, those with private insurance, and higher socioeconomic status and education. While the rate of reconstruction after CPM is increasing, there remain significant disparities. Conscious efforts must be made to eliminate these disparities, especially given the known benefits of reconstruction after mastectomy. [ABSTRACT FROM AUTHOR]

We aimed to evaluate the effects of the antioxidant thymoquinone on treated and untreated kidneys on histological and oxidative parameters as well as Kidney Injury Molecule (KIM-1) levels in an experimental unilateral ureteropelvic junction obstruction (UPJO) with resultant hydronephrosis (HN) model. In adherence to the Animal research: reporting of in vivo exepriments guidelines, 34 male Wistar rats were randomly divided into four groups which were named accordingly: “CO” (corn oil), “TQ” (thymoquinone and corn oil), “HNCO” (UPJO-HN and corn oil), “HNTQ” (UPJO-HN, thymoquinone and corn oil). Histologically, pelvic epithelial damage, glomerular shrinkage and sclerosis, tubular damage, interstitial edema-inflammation-fibrosis (IEIF), and vascular congestion were assessed. Biochemically, malondialdehyde (MDA), superoxide dismutase (SOD), glutathione reductase (GR) and KIM-1 levels were assessed. Macroscopic HN developed in all obstructed kidneys. Ipsilateral obstructed kidneys deteriorated in all histological parameters. Thymoquinone attenuated glomerular shrinkage and sclerosis alterations but increased vascular congestion. Contralateral non-obstructed kidneys also showed histological deterioration. Thymoquinone had beneficial effects in terms of IEIF presence in contralateral kidneys but it increased vascular congestion. MDA and SOD results were inconclusive. UPJO caused decreased GR levels in the ipsilateral kidneys but not in the contralateral ones. This effect was not ameliorated by thymoquinone treatment. KIM-1 levels were increased in ipsilateral obstructed kidneys with a lower level in HNTQ group than in HNCO. KIM-1 level of the ipsilateral HNTQ group was higher than in both non-obstructed ipsilateral kidney groups. The effect of thymoquinone in ameliorating bilaterally observed histological alterations was limited and controversial. Oxidative damage detected by GR measurements was not prevented by thymoquinone. Thymoquinone partially decreased the damage as evidenced by reduced KIM-1 levels in thymoquinone-treated obstructed kidneys. [ABSTRACT FROM AUTHOR]

Background: It is estimated that one-third of patients presenting with unilateral joint pain have contralateral osteoarthritis (OA) at first presentation. Most studies have primarily examined White patient cohorts. The purpose of this study was to determine the prevalence of contralateral joint OA for patients presenting for unilateral total knee (TKA), unicompartmental knee (UKA) or total hip arthroplasty (THA) among Asian, Native Hawaiian/Pacific Islander and White patients. Methods: Bilateral radiographic reports at initial presentation of 2,312 subjects who underwent unilateral arthroplasties (332 UKAs, 933 TKAs and 1,047 THAs) were reviewed. The presence of contralateral OA was recorded and compared by racial group and type of arthroplasty performed. Parametric statistical analyses were performed to determine differences between groups. Multivariable analyses were completed for each arthroplasty group to determine the influence on the presence of contralateral OA, presented as odds ratios and 95% confidence intervals. Results: Contralateral joint OA was present in 86.7%, 90.4% and 70.4% of UKA, TKA and THA patients, respectively. Concurrent hip OA was present in 41.6% and 59.5% of UKA and TKA patients. No racial differences in the prevalence of contralateral knee OA were found for knee arthroplasty patients. White patients (74.6%) had a greater prevalence of contralateral hip OA compared to Asians (66.5%, p = 0.037) amongst THA recipients. Increased age and body mass index were significantly associated with the presence of contralateral knee OA. Increased age, being male and being White were significant contributors for the presence of contralateral hip OA. Conclusion: The prevalence of contralateral joint OA and concurrent hip OA is high in all three racial groups. Due to the extensive prevalence of contralateral and concurrent knee and hip OA, bilateral radiographic evaluation should be considered for all patients presenting with unilateral hip or knee pain due to OA. [ABSTRACT FROM AUTHOR]

Background: We aimed to investigate the extent of the response of the orbicularis oris muscle to stimulation of the contralateral facial nerve both in patients with peripheral facial palsy (PFP) and in healthy subjects. Methods: EMG was performed at 2–6 weeks after the onset of PFP in the patient group and at any time in the healthy control group. We performed nerve conduction testing, electroneurography, and surface and needle EMG. Results: A total of 276 participants (patients/healthy controls: 218/58) were analyzed. The extent of the response of the contralateral orbicularis oris muscles to facial nerve stimulation was higher in healthy controls compared to that in the affected group. The response of the contralateral orbicularis oris muscles to stimulation of the paralyzed facial nerve was more extensive in those patients to whom glucocorticoid or physical therapy had been given. Cross-facial innervation in the orbicularis oris muscle extended up to 1.5 cm in one-third of healthy controls and was higher than that in those with PFP. Glucocorticoid or physical therapy seemed to improve cross-innervation in facial palsy. Conclusions: Our findings suggest that the stimulus leading to the contralateral muscular response is mediated through crossing axons rather than muscular fibers. [ABSTRACT FROM AUTHOR]

Background Little is known about the impact of screen-detected breast cancer compared with clinically detected breast cancer on the disease-free interval (ie, free from locoregional recurrences, distant metastasis, contralateral breast cancer). Moreover, it is thought that most studies overestimate the beneficial effect of screening, as they do not adjust for lead time. We investigated the association between method of breast cancer detection and disease-free interval, taking lead time into account. Methods Women aged 50-76 years, diagnosed with breast cancer between 2005 and 2008 were selected from the Netherlands Cancer Registry. Women diagnosed in 2005 were divided into screen-detected and clinically detected cancer and had a follow-up of 10 years (2005 cohort). Women diagnosed in 2006-2008 were divided into screen-detected, interval, and nonscreen-related cancer and had a follow-up of 5 years (2006-2008 cohort). A previously published method was used to adjust for lead time. Analyses were repeated correcting for confounding variables instead of lead time. Results The 2005 cohort included 6215 women. Women with screen-detected cancer had an improved disease-free interval compared with women with clinically detected cancer (hazard ratio [HR] = 0.77, 95% confidence interval [CI] = 0.68 to 0.87). The 2006-2008 cohort included 15 176 women. Women with screen-detected or interval cancer had an improved disease-free interval compared with women with nonscreen-related cancer (HR = 0.76, 95% CI = 0.66 to 0.88; HR = 0.88, 95% CI = 0.78 to 0.99, respectively). Correcting for confounders instead of lead time did not change associations. Conclusion Women with screen-detected cancer had an improved disease-free interval compared with women with a nonscreen-related or clinically detected cancer, after correction for lead time. [ABSTRACT FROM AUTHOR]

Choroid plexus papilloma (CPP) is a rare benign intracranial tumor origin that predominantly manifests in the lateral ventricle in children, accounting for 0.3%–0.6% of all primary intracranial tumors. It is extremely rare to have the CPP in the trigone of the lateral ventricle through the contralateral posterior interhemispheric transfalcine transprecuneus approach (PITTA). Herein, we report this rare case. A 7-year-old girl presented with headache. Magnetic resonance imaging of the brain showed periatrial lesions, and histopathological examination confirmed CPP (WHO grade I). The contralateral PITTA is a safe, effective, reasonable, and appropriate for some lesions in the trigone of the lateral ventricle. It provides a wider surgical angle (especially for the lateral extension) and reduces the risk of disturbance of the optic radiation compared with the conventional approaches. The use of multiple modern neurosurgical techniques, including interventional embolization, intraoperative navigation, microscope, and electrophysiological monitoring, make the procedure much easier and more accurate, and the neuroendoscope adds to the visualization of the microscope and can reduce surgical complications.

Objectives: To explore the preoperative high-risk clinical factors for contralateral medium-volume central lymph node metastasis (conMVCLNM) in unilateral papillary thyroid carcinoma (uPTC) and the indications for dissection of contralateral central lymph nodes (conCLN). Methods: Clinical and pathological data of 204 uPTC patients who underwent thyroid surgery at the Hangzhou First People's Hospital from September 2010 to October 2022 were collected. Univariate and multivariate logistic regression analyses were conducted to determine the independent risk factors for contralateral central lymph node metastasis (conCLNM) and conMVCLNM in uPTC patients based on the preoperative clinical data. Predictive models for conCLNM and conMVCLNM were constructed using logistic regression analyses and validated using receiver operating characteristic (ROC) curves, concordance index (C-index), calibration curves, and decision curve analysis (DCA). Results: Univariate and multivariate logistic regression analyses showed that gender (P < 0.001), age (P < 0.001), tumor diameter (P < 0.001), and multifocality (P = 0.008) were independent risk factors for conCLNM in uPTC patients. Gender (P= 0.026), age (P = 0.010), platelet-to-lymphocyte ratio (PLR) (P =0.003), and tumor diameter (P = 0.036) were independent risk factors for conMVCLNM in uPTC patients. A predictive model was established to assess the risk of conCLNM and conMVCLNM, with ROC curve areas of 0.836 and 0.845, respectively. The C-index, the calibration curve, and DCA demonstrated that the model had good diagnostic value. Conclusion: Gender, age, tumor diameter, and multifocality are high-risk factors for conCLNM in uPTC patients. Gender, age, tumor diameter, and PLR are high-risk factors for conMVCLNM in uPTC patients, and preventive conCLN dissection should be performed. [ABSTRACT FROM AUTHOR]

This article discusses the feasibility and effectiveness of using the contralateral supracerebellar-infratentorial (cSCIT) approach for the surgical resection of thalamic cavernous malformations (CMs). Thalamic CMs are challenging to treat due to their deep-seated location and proximity to vital neurovascular structures. The cSCIT approach offers a unique perspective for addressing CMs located posteriorly within the thalamus. The study presents the results of a single patient who underwent thalamic CM resection using the cSCIT approach, demonstrating successful lesion removal and minimal postoperative neurological deficits. The findings highlight the potential of the cSCIT approach as a secure and effective surgical alternative for thalamic CMs. [Extracted from the article]

Purpose: To evaluate the clinical outcomes of primary or revision ACL reconstruction (ACLR) after contralateral hamstring autografts versus ipsilateral hamstring autograft harvest. Methods: Three databases (MEDLINE, PubMed and EMBASE) were searched from inception to April 27th, 2023 for studies investigating contralateral hamstring autografts in primary or revision ACLR. The authors adhered to the PRISMA and R-AMSTAR guidelines as well as the Cochrane Handbook for Systematic Reviews of Interventions. Data on demographics, strength measures, patient-reported outcome measures (PROMs), and rates of positive Lachman test, positive pivot-shift test and graft rupture were extracted. PROMs included Lysholm, International Knee Documentation Committee (IKDC) and Tegner scores. Results: Nine studies comprising 371 patients were included in this review. In primary ACLR, there were no significant differences between contralateral and ipsilateral groups in isokinetic hamstring torque in the non-ACLR limb or isokinetic quadriceps torque in both limbs when tested at 60, 90, 120 or 180 degrees/second. Isokinetic hamstring torque in the non-ACLR limb was significantly weaker in the contralateral group at six months for primary ACLR; however, these deficits did not persist. There were no significant differences in postoperative median Tegner scores and Lysholm scores between contralateral and ipsilateral groups in primary ACLR. There were no significant differences in postoperative median Tegner, mean Lysholm and IKDC scores between groups in revision ACLR. There were no significant differences in positive Lachman, positive pivot-shift and rupture rates in primary ACLR between groups. Rates of positive Lachman and pivot-shift were slightly higher in the contralateral than ipsilateral group for revision ACLR. Conclusion: Contralateral hamstring autografts results in comparable muscle strength to ipsilateral hamstring autografts, with the exception of weaker hamstring strengths in the early postoperative period. Patient-reported outcome measures were similar between the two groups across both primary and revision ACLR, with rates of instability and failure being similar between groups for primary ACLR. Contralateral hamstring grafts do not provide additional benefit when compared to ipsilateral options for either primary or revision ACLR, and should be used only in select circumstances including insufficient ipsilateral hamstring grafts or situations where quadriceps or patella autografts are not optimal. Level of evidence: Level IV. [ABSTRACT FROM AUTHOR]

Background: Anterior cruciate ligament (ACL) reinjury after ACL reconstruction (ACLR) can occur on the ipsilateral or contralateral side. Limited evidence exists regarding the difference between the incidence of reinjury to either knee, which is important in developing interventions to prevent ACL reinjury. Purpose: To compare the reinjury rate of the ACL on the ipsilateral side versus the contralateral side in athletes after ACLR and investigate the risk factors that may cause different reinjury rates between the sides. Study Design: Systematic review; Level of evidence, 4. Methods: A systematic review was performed based on the PRISMA (Preferred Reporting Items for Systematic Reviews and Meta-Analyses) guidelines. Studies that involved ACL reinjury in athletes after ACLR were reviewed. Considering several risk factors, including age and sex, a comparison of ACL reinjury incidence on the ipsilateral and contralateral sides was performed using a meta-analysis. Results: Of the 17 selected studies, 3 were found to be at high risk of bias, and thus, 14 (n = 3424 participants) studies were included in the meta-analysis. In this athletic population, the contralateral ACL had a significantly higher rupture rate than the ipsilateral graft (risk ratio [RR], 1.41; P <.0001). Female athletes were found to have a greater risk of ACL reinjury on the contralateral versus the ipsilateral side (RR, 1.65; P =.0005), but different results were found in male athletes. (RR, 0.81; P =.21). There was no statistical difference in the incidence rate of ACL reinjury to either side in adolescent athletes (RR, 1.15; P =.28). Conclusion: The contralateral ACL was more vulnerable to reinjury than the ipsilateral side in athletes after ACLR. Female athletes were more likely to reinjure their contralateral native ACL, while the same trend was not found in their male counterparts. The reinjury rate was comparable in both knees in adolescent athletes. [ABSTRACT FROM AUTHOR]

Objective This study aimed to evaluate the treatment of spinal stenosis with spondylolisthesis using bilateral-contralateral unilateral biportal endoscopic (UBE) decompression to minimize facet joint damage. Methods We retrospectively evaluated 42 patients with grade 1 spondylolisthesis who underwent bilateral-contralateral UBE decompression between July 2018 and September 2019. To identify segmental instability, static and dynamic images from preoperative and postoperative procedures and final follow-up radiographs were reviewed. Lateral radiograph slippage ratio, sagittal motion, and facet joint preservation were evaluated. Clinical assessments were conducted using the visual analogue scale (VAS), Oswestry Disability Index (ODI), and modified MacNab criteria. Results The average final follow-up period was 26.5 ± 1.3 months. The average preoperative slip percentage was 15.70% ± 5.25%, which worsened to 18.80% ± 5.41% at the final follow-up (p < 0.005). The facet joint preservation rate was 95.6% ± 4.1% on the contralateral side. Improvements in the VAS scores (leg pain: from 7.9 ± 2.2 to 3.1 ± 0.7; p < 0.005; back pain: from 7.2 ± 3.0 to 2.8 ± 1.0; p < 0.005) were observed at the final follow-up. The mean preoperative ODI was 26.19 ± 3.42, which improved to 9.6 ± 1.0 (p < 0.005). Thirteen patients exhibited delayed focal segmental instability following decompression. Despite the absence of symptoms or improvement with conservative treatment in the majority of patients with delayed instability, two patients required fusion surgery to address the instability. Additionally, 2 patients developed facet synovial cysts, while 2 experienced spinous process fractures. Conclusion Bilateral decompression with a contralateral UBE approach could be an effective and alternative treatment method to reduce instability in spinal stenosis with grade 1 spondylolisthesis.

Abstract Purpose To perform a systematic review of the clinical outcomes of anterior cruciate ligament reconstruction using either contralateral or ipsilateral tendon autografts. Methods A systematic review of literature published from inception to December 9, 2022, in multiple databases (PubMed, Embase, Scopus, and the Cochrane Library) was conducted in accordance with the 2020 PRISMA (Preferred Reporting Items for Systematic Reviews) guidelines. Two reviewers independently screened the literature, extracted the data, performed the risk of bias assessment and assessed the study quality. At least one of the following outcomes was evaluated for each study: muscle strength (isometric strength of the quadriceps or hamstring muscles, isokinetic peak flexion torque of the hamstring, or isokinetic peak extension torque of the hamstring), knee laxity examination, Lysholm score, pivot shift, International Knee Documentation Committee (IKDC) score, Knee Injury and Osteoarthritis Outcome Score (KOOS), Lachman test result, return to sports time, or incidence of complications. A random effects model was used for all analyses. Results Four hundred scientific manuscripts were recovered in the initial search. After screening, 12 studies (2 randomized controlled trials, 9 cohort studies, and 1 case- control study) met the search criteria for the qualitative analysis. Among them, 9 cohort studies were used for the quantitative analysis. The results showed few statistically significant differences in terms of muscle strength (contralateral group versus ipsilateral group or donor site group versus ipsilateral group or donor site group versus nonoperative group), Lysholm score, and return to sports time. A comparison showed no significant differences in knee laxity, IKDC score, Tegner activity score, Lachman test score, or incidence of complication, or contralateral rupture. Conclusions In anterior cruciate ligament reconstruction, the contralateral autologous tendon has a similar effect as the ipsilateral autologous tendon.

Abstract Background Breast cancer (BC) is the most common cancer among women worldwide. Increased survival of primary BC (PBC) has increased contralateral breast cancer (CBC) and become a health problem. Aims This study aimed to determine the effect of disease‐free interval (DFI), risk factors and PBC characteristics on the progression of CBC within primary BC survivors. Methods and Results This retrospective study identified 5003 women diagnosed with breast cancer between 2000 and 2020 in the cancer research center. The study included 145 CBC and 4858 PBC survivors, with CBC diagnosed at least 6 months after the detection of primary BC. ER+, PR+, and HER2+ were reported in 72.13%, 66.67%, and 30% of CBC patients. Invasive ductal carcinoma (IDC) BC was reported in 69.57% of patients, and 81.90% and 83.64% of the patients were treated with adjuvant chemotherapy and external radiotherapy. The Kaplan–Meier method indicated that the median time interval between PBC and CBC was 3.92 years, and the 5‐year DFI was 97%. The Cox proportional hazard regression model indicated that although more than half of the participants had no family history of BC (69.57%), women 60 years and older were negatively associated with CBC. Conclusion This study provides the first investigation of CBC and DFI risk factors among PBC survivors in Iran. Age was found to be negatively associated with CBC development particularly after the age of 60, indicating the necessity of tracking CBC survivors carefully in this age group.

Purpose: To perform a systematic review of the clinical outcomes of anterior cruciate ligament reconstruction using either contralateral or ipsilateral tendon autografts. Methods: A systematic review of literature published from inception to December 9, 2022, in multiple databases (PubMed, Embase, Scopus, and the Cochrane Library) was conducted in accordance with the 2020 PRISMA (Preferred Reporting Items for Systematic Reviews) guidelines. Two reviewers independently screened the literature, extracted the data, performed the risk of bias assessment and assessed the study quality. At least one of the following outcomes was evaluated for each study: muscle strength (isometric strength of the quadriceps or hamstring muscles, isokinetic peak flexion torque of the hamstring, or isokinetic peak extension torque of the hamstring), knee laxity examination, Lysholm score, pivot shift, International Knee Documentation Committee (IKDC) score, Knee Injury and Osteoarthritis Outcome Score (KOOS), Lachman test result, return to sports time, or incidence of complications. A random effects model was used for all analyses. Results: Four hundred scientific manuscripts were recovered in the initial search. After screening, 12 studies (2 randomized controlled trials, 9 cohort studies, and 1 case- control study) met the search criteria for the qualitative analysis. Among them, 9 cohort studies were used for the quantitative analysis. The results showed few statistically significant differences in terms of muscle strength (contralateral group versus ipsilateral group or donor site group versus ipsilateral group or donor site group versus nonoperative group), Lysholm score, and return to sports time. A comparison showed no significant differences in knee laxity, IKDC score, Tegner activity score, Lachman test score, or incidence of complication, or contralateral rupture. Conclusions: In anterior cruciate ligament reconstruction, the contralateral autologous tendon has a similar effect as the ipsilateral autologous tendon. [ABSTRACT FROM AUTHOR]

Background: The main challenge in tuberculum sellae meningioma (TSM) resection is the safe dissection of the optic nerves, which many a times are compressed and distorted by the tumor. While intuitive, an approach from the side of predominant tumor extension makes tumor dissection from the medial surface of the ipsilateral optic nerve rather blind. We describe here a contralateral supraorbital eyebrow approach (c-SEA) to address this "blind spot." Method: c-SEA was performed using a 2 × 2 cm craniotomy. The patient improved after surgery and postoperative imaging confirmed the totality of the tumor resection. Conclusion: c-SEA can be an excellent minimally invasive option for asymmetric TSM. [ABSTRACT FROM AUTHOR]

Background: This study aimed to investigate the prognosticator of the contralateral rotator cuff in patients who underwent arthroscopic rotator cuff repair (ARCR) for symptomatic rotator cuff tear (RCT). Methods: A total of 104 patients with a mean age of 64.7 years (range, 40–83 years) underwent ARCR and were checked for the presence of a contralateral RCT using preoperative ultrasonography. Preoperative demographic data, including patients’ occupations and sports activities, were also evaluated. Results: The mean follow-up period for the operated shoulder was 25.0 months (range, 12–72 months). An RCT of the contralateral shoulder was observed in 40 of the 104 (38.5%) patients. Contralateral shoulder pain was observed in 16 (40%) and 15 (23.1%) patients in the RCT group preoperatively and the non-tear group, respectively. Of the 31 patients with shoulder pain, a poor prognosis was seen in 17 (54.8%). Statistical significance was observed between the active and sedentary groups in the RCT group, with eight patients (30.8%) in the active group and none in the sedentary group having a poor prognosis (P = .02). In contrast, in the non-tear group, a poor prognosis was observed in four patients (10.5%) in the active group, which was not significantly different compared to the five patients (19.2%) in the sedentary group (P = .33). Conclusions: For patients in the active group, RCTs are a risk factor for poor prognosis in the contralateral shoulder of ARCR.

Background: Achilles tendon ruptures (ATR) can have devastating results for athletes in the National Football League (NFL). While many studies have examined the effects of an ipsilateral ATR, there are no reports on the impact of bilateral ATRs on NFL athlete performance. Methods : Publicly available online injury data for NFL athletes who sustained bilateral ATRs between the start of the 2007 season and the start of the 2021 season were queried using online news and sports analysis web sources. Results : After applying inclusion and exclusion criteria, 5 NFL athletes were identified. The findings demonstrated a significant difference in age at the time of each rupture (27.8 vs 30.4 years, P <.01) along with a decreasing trend in the number of Pro Bowl nominations following successive ATRs (P =.027). There were no differences reported for the duration and number of games missed during either rehabilitation period following an ATR. Upon analyzing defensive NFL athletes, forced fumbles was the only performance metric that significantly changed across successive ATRs. Conclusion : Overall, bilateral ATRs can adversely impact an NFL player's performance and further research should be performed to continue analyzing the effects of bilateral ATRs on these athletes. Level of Evidence: 4 [ABSTRACT FROM AUTHOR]

Uterine secretions provide a suitable environment for sperm selective migration during a couple of days preceding ovulation and for early embryo development before implantation. Our goal was to identify and quantify proteins in the bovine uterine fluid during the periovulatory period of the estrous cycle. Genital tracts with normal morphology were collected from adult cyclic Bos taurus females in a local slaughterhouse and classified into pre-ovulatory or post-ovulatory stages of cycle (around days 19–21 and 0–5 of cycle, respectively; n = 8 cows per stage) based on ovarian morphology. Proteins from uterine fluid collected from the utero-tubal junction to the base of each horn (four pools of two cows per condition) were analyzed by nanoLiquid Chromatography coupled with tandem Mass Spectrometry (nanoLC-MS/MS). A total of 1214 proteins were identified, of which 91% were shared between all conditions. Overall, 57% of proteins were predicted to be secreted and 17% were previously reported in uterine extracellular vesicles. Paired comparisons between uterine horns ipsilateral and contralateral to ovulation evidenced 12 differentially abundant proteins, including five at pre-ovulatory stage. Furthermore, 35 proteins differed in abundance between pre- and post-ovulatory stages, including 21 in the ipsilateral side of ovulation. Functional analysis of identified proteins demonstrated roles in binding, metabolism, cellular detoxification and the immune response. This study provides a valuable database of uterine proteins for functional studies on sperm physiology and early embryo development. • This is the first proteomic profiling of the peri-ovulatory uterine fluid in cattle. • Albumin, complement C3, myosin 9 and mucin 5B were among the most abundant proteins. • 35 differentially abundant proteins between peri-ovulatory stages were identified. • 12 differentially abundant proteins between uterine horns were identified. • Proteins were mostly involved in metabolism, detoxification and immune system. [ABSTRACT FROM AUTHOR]

To investigate the occult contralateral papillary thyroid carcinoma (PTC)-associated ultrasound (US) and clinical characteristics and establish a US-based model for the prediction of occult contralateral carcinoma in adolescents and young adults (AYAs) who were diagnosed with unilateral thyroid carcinoma preoperatively. From January 2015 to December 2020, patients who were diagnosed with unilateral thyroid carcinoma by preoperative US examination and underwent total thyroidectomy or thyroid lobectomy with more than 60 months of US follow-up at our hospital were retrospectively collected. Univariate and multivariate analyses were applied to identify the independent risk factors associated with occult contralateral PTC in AYAs, on which a prediction model was developed. The performance of the model was evaluated with accuracy, sensitivity, specificity, and the area under the receiver operating characteristic curve. Occult contralateral PTC was found in 91 of 365 (24.9%) PTC patients with a median age at diagnosis of 26 years (interquartile range, 24–29 years). The multivariate analysis indicated that the presence of contralateral benign nodule, intra-tumoral calcification, and intraglandular dissemination were significantly associated with occult contralateral PTC in AYAs. The prediction model, which incorporated all independent predictors, yielded an area under the receiver operating characteristic curve of.661 (95% CI:.602–.719). The accuracy, sensitivity and specificity were 67.9%, 54.9%, and 72.3%, respectively. The US-based prediction model proposed here exhibited a favorable performance for predicting occult contralateral PTC, which might be used to determine the appropriate extent of surgery for AYAs who had a preoperative diagnosis of unilateral thyroid carcinoma. [ABSTRACT FROM AUTHOR]

Background: One of the most important aspects of dental surgery is the injection of local anesthetics, which control pain. Local anesthetics are administered close to certain nerves or fibers to block nerve transmission. Intraoral administration of local anesthetics, on the other hand, can affect other nerves, resulting in complications in the outside of the oral cavity. Ophthalmic problems are uncommon, accounting for about 0.04 to 0.1% of all complications Purpose: The purpose of this case is to discuss the unusual case of contralateral ocular complication following dental local anaesthesia. Case: We reported a 41 years old Malay male came to Kuching Armed Forces Dental Clinic for his appointment on surgical removal of impacted left lower wisdom tooth. After the minor oral surgery procedure under local anaesthesia has been done, the patient had a twitching right eye. Case Management: The patient's vital signs were checked to rule out the possibility of a stroke or anaphylactic shock. The patient was a sure to be calmed, laid down, and put cold compresses on both eyes with dim lighting. After 45 minutes of review, the patient was allowed to leave, followed by a two-week post-minor surgery check-up. Conclusion: Risk of complications from local anaesthesia can be reduced with the effective patient evaluation and anxiety management, correct injection technique, and sufficient knowledge of dental local anaesthesia.

Traumatic vertebral artery injury is a rare, life-threatening injury that has been increasingly managed with endovascular intervention. However, an antegrade endovascular approach alone can fail to occlude traumatic pseudoaneurysms (PSAs) and arteriovenous fistulas (AVFs), requiring high-risk surgical reoperation. We have presented the case of a 27-year-old man with traumatic right vertebral artery PSA and AVF. Despite successful ipsilateral coil embolization, the PSA and AVF persisted via retrograde filling from the contralateral vertebral artery. Distal coil embolization was achieved through the contralateral vertebral artery in a novel “up and over” approach through the basilar artery. The findings from our case report have broadened the endovascular options for complicated traumatic injuries.

• A notable proportion of people (35 out of 106, 33%) with a Workers' Compensation claim for hernia have an incidental (asymptomatic) hernia elsewhere. • People who have a second, incidental hernia, are either less likely to be offered or less likely to choose surgery. • Our data support that hernia might be incidental to abdominal symptoms (e.g. muscle strain) but is unlikely to be caused by strenuous physical activity. • Population-based studies of the prevalence of incidental hernia by occupation and longitudinal studies of people starting heavy labor occupations can help determine if there is an association between heavy work and pathology of abdominal hernia. There is a gap in evidence that demonstrates an increased risk of hernia formation in laborers. A notable incidence of a second asymptomatic hernia among people making a workers' compensation claim for a hernia would suggest that the pathology is not acute and probably not related to work, or the performance of a single strenuous event. We performed a retrospective database study of a consecutive sample of 106 adults who claimed a work-related abdominal hernia between September 2016 and December 2018 and had a Computed Tomography (CT) scan as part of a diagnostic workup. Hernias were classified as incidental if patients had a contralateral inguinal hernia with unilateral groin symptoms, or if patients had a ventral hernia with only groin symptoms or vice versa. Thirty-three percent of patients had an incidental hernia. No patient factors were associated with having an incidental hernia. Higher BMI and having a concurrent incidental hernia were associated with lower odds of surgical treatment under the injury claim. Abdominal symptoms after a work event might lead to a diagnosis of hernia, and there is a notable likelihood that the hernia is incidental and unrelated to work. New symptoms at or near the site of an abdominal hernia may or may not be from the hernia, and very often are more consistent with an abdominal muscle strain. The clinical or imaging finding of an abdominal wall defect or the presence of a hernia may be incidental, unrelated to the physical activity. [ABSTRACT FROM AUTHOR]

Objective: To observe the effects of TENS on the contralateral limb and PLP reduction. Materials and Methods: This was a single center retrospective study of 20 amputee participants with phantom limb pain. The inclusion criteria were participants aged above 18, average pain of at least 4/10 on the numerical rating scale (NRS), duration of pain longer than one week and treatment with TENS on the opposite side. We recorded pain intensity before and after TENS application, response time to treatment, satisfaction, and adverse effects. Results: Of the 20 amputee participants, all patients suffered from PLP and three also suffered from residual limb pain. The average pain score before use of TENS was 4.85/10 and after was 1.15/10. The mean pain intensity score was reduced by 3.7/10 (95% CI 2.95-4.45/10) or 76.28% (95% confidence interval 63.61-89.47%). The average overall satisfaction was 81.65%, and no adverse effects from application of TENS was reported. Conclusion: The study shows that the application of TENS on the opposite side is a safe and effective treatment method for intractable pain from PLP.

Abstract Background Combining targeted biopsy (TB) with systematic biopsy (SB) is currently recommended as the first-line biopsy method by the European Association of Urology (EAU) guidelines in patients diagnosed with prostate cancer (PCa) with an abnormal magnetic resonance imaging (MRI). The combined SB and TB indeed detected an additional number of patients with clinically significant prostate cancer (csPCa); however, it did so at the expense of a concomitant increase in biopsy cores. Our study aimed to evaluate if ipsilateral SB (ipsi-SB) + TB or contralateral SB (contra-SB) + TB could achieve almost equal csPCa detection rates as SB + TB using fewer cores based on a different csPCa definition. Methods Patients with at least one positive prostate lesion were prospectively diagnosed by MRI. The combination of TB and SB was conducted in all patients. We compared the csPCa detection rates of the following four hypothetical biopsy sampling schemes with those of SB + TB: SB, TB, ipsi-SB + TB, and contra-SB + TB. Results The study enrolled 279 men. The median core of SB, TB, ipsi-SB + TB, and contra-SB + TB was 10, 2, 7 and 7, respectively (P

Purpose: To determine the efficacy of two myopia control contact lenses (CL) compared with a single‐vision (SV) CL. Methods: Ninety‐five Chinese children with myopia, aged 7–13 years in a 1‐year prospective, randomised, contralateral, cross‐over clinical trial with 3 groups; bilateral SVCL (Group I); randomised, contralateral wear of an extended depth of focus (EDOF) CL and SVCL (Group II) and MiSight® CL and SVCL (Group III). In Groups II and III, CL were crossed over at the 6‐month point (Stage 1) and worn for a further 6 months (Stage 2). Group I wore SVCL during both stages. At baseline and the end of each stage, cycloplegic spherical equivalent refractive error (SE) and axial length (AL) were measured. Six‐monthly ΔSE/ΔAL across groups was analysed using a linear mixed model (CL type, stage, eye and eye* stage included as factors). Intra‐group paired differences between eyes were determined. Results: In Group I, mean (SD) ΔSE/ΔAL with SVCL was −0.41 (0.28) D/0.13 (0.09) mm and −0.25 (0.27) D/0.16 (0.09) mm for stages 1 and 2, with a mean paired difference between eyes of 0.01 D/0.01 mm and 0.05 D/−0.01 mm, respectively. ΔSE/ΔAL with SVCL was similar across Groups I to III (Stage 1: p = 0.89/0.44, Stage 2: p = 0.70/ 0.64). In Groups II and III, ΔSE/ΔAL was lower with the EDOF and MiSight® CL than the contralateral SVCL in 68% to 94% of participants, and adjusted 6‐month ΔSE/ΔAL with EDOF was similar to MiSight® (p = 0.49/0.56 for ΔSE/ΔAL, respectively). Discontinuations across the three groups were high, but not different between the groups (33.3%, 48.4% and 50% for Groups I to III, respectively [p = 0.19]) and most discontinuations occurred immediately after baseline. Conclusions: Extended depth of focus and MiSight® CL demonstrated similar efficacy in slowing myopia. When switched from a myopia control CL to SVCL, myopia progression was similar to that observed with age‐matched wearers in SVCL and not suggestive of rebound. [ABSTRACT FROM AUTHOR]

Purpose: To explore whether the severity of contralateral knee osteoarthritis (OA) is associated with OA progression in ipsilateral knee with early OA. Methods: Knees in early OA (Kellgren-Lawrence grade (KLG):1–2) with intact baseline demographic and clinical data were retrieved from OAI database and defined as target knees. The target knees were divided into the exposure group (contralateral knees KLG 3 to 4) and the control group (contralateral knees KLG 0 to 2). Both groups underwent propensity score matching (PSM) concerning demographic data, as well as radiographic and clinical outcomes at the baseline. The primary outcome was the upgrade of KLG in the target knee in the first 12 and 24 months. The secondary outcome was the incidence of knee arthroplasty in ipsilateral knee during the first 108 months. Results: One thousand seven hundred fifty-two knees were included, with 449 in the exposure cohort and 1276 in the control cohort. Four hundred thirty-four knees in each group were matched after PSM. Target knees in the exposure cohort showed a significantly higher rate of radiographic progression in the first 12 months (12.9% vs. 5.1%, P < 0.001) and 24 months (19.6% vs. 8.1%, P < 0.001). As for the risk of future arthroplasty, a significant difference was also found between the two groups (7.8% vs. 4.0%, P = 0.02). Kaplan–Meier analysis showed that the 108-month accumulated knee survival rate was significantly lower in the exposure group (P = 0.01). Conclusion: The ipsilateral knee with early-stage OA is prone to have worse early to mid-, and long-term prognosis in the circumstance of contralateral radiographic advanced knee OA. Key Points •Identifying early knee osteoarthritis (OA) with a high risk of radiographic progression and future arthroplasty enables early personalized intervention. •This is a novel study to investigate the relationship between the risk of future arthroplasty and contralateral knee status. •Propensity score matching holds promise to minimize selection bias in observational studies. •Knees with early OA are prone to have a high risk of radiographic progression and future arthroplasty in the circumstance of contralateral advanced knee OA. [ABSTRACT FROM AUTHOR]

Background: Femoroacetabular impingement (FAI) is one of the most common causes of hip osteoarthritis, yet the factors controlling disease progression are poorly understood. Purpose: To investigate rates of initial and subsequent symptoms in the contralateral hip of patients with FAI, and identify predictors of disease progression (symptom development and surgical intervention) in the contralateral hip. Study Design: Cohort study; Level of evidence, 2. Methods: This prospective study included a minimum 5-year follow-up of the contralateral hip in 179 patients undergoing FAI surgery. Symptoms (moderate pain) and surgical progression were monitored. Univariate and multivariate analyses compared patient-specific and imaging characteristics of symptomatic patients with those who remained asymptomatic to identify factors associated with disease progression. Results: A total of 150 patients (84% follow-up) were followed for a mean of 7.1 years (range, 5-11 years). Thirty-nine of these patients (26% [39/150]) had contralateral hip symptoms at initial evaluation. Of those without contralateral hip symptoms at initial evaluation, 32% (36/111) had developed contralateral hip symptoms by latest follow-up. Those who developed symptoms during the study period had a lower anteroposterior head-neck offset ratio (0.153 vs 0.165; P =.005), decreased total arc of rotation in 90° of flexion (39.9° vs 51.1°; P =.005), and decreased external rotation in 90° of flexion (28.6° vs 37.1°; P =.003) compared with those who never developed symptoms. Age, sex, body mass index, alpha angle, lateral center-edge angle, internal rotation in flexion, and University of California, Los Angeles (UCLA), activity score were similar between these groups. Those with contralateral symptoms at initial evaluation progressed to contralateral surgery at a rate of 41% (16/39) and those who developed contralateral symptoms during the study period progressed to contralateral surgery at a rate of 28% (10/36). Among those with contalateral hip symptoms (either present initially or developed during study period)), younger age (24.6 vs 34.1 years; P <.001) and baseline UCLA activity score ≥9 (P =.003) were associated with progression to surgery. By Kaplan-Meier analysis, 64%, 54%, and 48% of patients remained free of contralateral hip symptoms at 2, 5, and 10 years. Conclusion: At a mean follow-up of 7.1 years, significant symptoms in the contralateral hip of patients with FAI were present in approximately 50% of patients. FAI disease progression (symptom development and surgical intervention) was associated with decreased hip rotation arc, decreased external rotation, and decreased head-neck offset ratio. In symptomatic patients, younger age and UCLA activity score ≥9 were associated with progression to surgery. These findings represent important factors for patient counseling and risk modeling in FAI. [ABSTRACT FROM AUTHOR]

Background: An open wedge high tibial osteotomy (OWHTO) may lead to gait alteration, which change the contact loading in the contralateral knee, while clear evidence about the impact on contralateral knee still lacks. The purpose of the current study was to evaluate the change in scintigraphic uptake using SPECT-CT in the medial compartment of the contralateral knee following OWHTO., Methods: Contralateral radiographic measurements were performed for patients with medial osteoarthritis and varus malalignment of >5° treated with OWHTO in this retrospective analysis. The medial compartmental changes according to SPECT/CT analysis before and 1-year after OWHTO were evaluated on the contralateral side., Results: The study comprised 72 patients. The mean preoperative mechanical femorotibial angle was a mean varus of 7.6° (range, 5.1° - 13.0°), corrected to a mean valgus of 2.5° (range, 1.9° - -8.5°) postoperatively. The average grading of the scintigraphic uptakes in the medial compartment of the contralateral knee was significantly decreased 1 year postoperatively than after the surgery (from 2.8 ± 0.4 to 2.1 ± 0.6, p < 0.001). Measurable differences in varus alignment on radiographs of the contralateral limb were identified. The preoperative mechanical axis value decreased from 8.0° ± 2.4° to 6.7° ± 2.6° at the 3-month postoperative visit (p = 0.011). The overall decrease in varus alignment remained at the 2-year final postoperative follow-up., Conclusion: Alignment correction by OWHTO results in reducing scintigraphy uptakes in medial compartment and improvement in mechanical alignment of the contralateral knee., Level of Evidence: Therapeutic Level IV., Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper., (Copyright © 2024 The Author(s). Published by Elsevier B.V. All rights reserved.)

ObjectiveUnilateral biportal endoscopic (UBE)surgery is being increasingly adopted as a minimally invasive technique. The purpose of the current study was to introduce a novel surgical technique for lateral recess and same-level foraminal decompression by the contralateral inclinatory approach with unilateral biportal endoscopy(CIA-UBE) at the lumbar level.MethodsBetween January 2020 and February 2022, 10 patients suffering from lateral recess and same-level foraminal stenosis at the lumbar level underwent UBE surgery by contralateral inclinatory approach (CIA-UBE). Magnetic resonance imaging (MRI) scans were examined after surgery to measure the cross-sectional area (CSA) of the spinal canal (CSA-SC), the CSA of the intervertebral foramen (CSA-IVF), and the CSA of the facet joint (CSA-FJ). Postoperative radiologic images using computed tomography (CT) were obtained to investigate the existence of facet joint violation. Clinical outcomes were assessed using Oswestry Disability Index (ODI) scores and visual analogue scale (VAS) scores for buttock and radicular pain.ResultsTen levels were decompressed, and the mean age of the patients was 56.92 ± 13.26 years. The mean follow-up period was 7.60 ± 4.47 months. The average operative time was 85.14 ± 25.65 min. Postoperative CT and MRI revealed ideal neural decompression of the treated segments in all patients. CSA-IVF and CSA-FJ improved significantly, indicating good foraminal and lateral recess decompression with less damage to facet joints. Preoperative VAS and ODI scores improved significantly after surgery.ConclusionCIA-UBE may be an effective surgical treatment of the lateral recess and same-level foraminal stenosis at the lumbar level, which provides successful surgical decompression for traversing and exiting nerve roots with a better operative view and easier surgical manipulation. This approach may also help to maximize the preservation of the facet joint.

Contralateral lymph node metastasis (CLNM) is a poor prognostic factor in patients with oral squamous cell carcinoma (OSCC). There is limited data from India on this topic. The aim of this study was to evaluate the outcomes of contralateral positive cancer patients undergoing neck dissection in a tertiary hospital in India. We retrospectively reviewed the electronic medical records of 180 patients who had bilateral lymph nodes dissection for OSCC. Demographic, clinico-pathological and follow up data was abstracted directly from patients' electronic medical records. We analyzed the disease-free survival (DFS) and overall survival (OS) of these patients using a log-rank test (univariate) and cox proportional hazards model (multivariate). The median age of the cohort was 52 years (21-78 years) and comprised 125 males (69.4%). 83 (46.1%) patients had nodal metastasis on the contralateral side. Median follow up for patients who were alive at the time of analysis was 25.6 months (0.1- 130.1 months). Deeper lesion (depth 2.15 cm vs 1.70 cm, p=0.01), presence of lymphovascular invasion (LVI) (51.9% vs 31.4%, p=0.01), extranodal extension (ENE) (54% vs 34.4%, p=0.01) and nodal metastasis to ipsilateral level IV (83.3% vs 33.1%, p<0.01) predisposed to contralateral nodal metastasis. There were 92 disease failures in this cohort with 2 year DFS of 52%. Depth of invasion (DoI) [Hazard ratio (HR) 1.21, 95% confidence interval (CI) 1.02- 1.44, p=0.03), involved margins (HR 3.49, CI 1.83- 6.64, p<0.01), presence of perineural invasion (PNI) (HR 2.64, CI 1.54- 4.53, p <0.01), masticator space invasion (HR 2.10, CI 1.01- 4.08, p= 0.03) and presence of extranodal extension (ENE) in contralateral node (HR HR 2.29, CI 1.00- 5.29, p= 0.04) predicted poorer DFS on univariate analysis. On multivariate analysis, tongue as primary site(HR 0.49, CI 0.28- 0.85, p=0.01), involved margins (HR 2.66, CI 1.30- 5.43, p<0.01) and PNI (HR 2.62, CI 1.36- 4.99, p<0.01) affected the DFS significantly. There were 54 deaths in this cohort with a 2-year OS of 70.1%. Involved margins (HR 4.89, CI 2.17- 11.05, p<0.01), PNI (HR 3.11, CI 1.47- 6.61, p<0.01) and ENE (HR 1.77, CI 1.01- 3.07, p=0.04) were associated with a poorer OS on univariate analysis. On multivariate analysis, involved margins (HR 2.91, CI 1.22- 6.97, p=0.02) and PNI (HR 2.25, CI 1.02- 4.98, p=0.04) resulted in patients having poorer OS. This study provides valuable insights into the outcomes of patients with contralateral lymph nodal metastasis for patients who underwent curative intent surgery for oral squamous cell carcinoma. Deeper lesions, presence of lymphovascular invasion, extranodal extension and nodal metastasis to ipsilateral level IV predisposed to contralateral nodal metastasis. Primary site, involved margins and perineural invasion predicted the disease free survival, whereas involved margins and perineural invasion predicted overall survival in this cohort of patients. [Display omitted] [ABSTRACT FROM AUTHOR]

Eustachian tube appears to be central to the pathogenesis of all forms of otitis media. The reported frequency of bilateral disease ranges from 27 to 55%. The affected ear may well be the end point of the pathology in the contra lateral ear (CLE). Cross sectional observational study. One hundred patients who had unilateral chronic otitis media (COM) were enrolled in the study. Diseased ear was divided into either mucosal or squamosal type. Otoendoscopy, pure tone audiometry, impedance audiometry and X-ray mastoid (Schuller's view) findings of CLE were noted. Considering all the changes including tympanic membrane, X-ray mastoid, hearing assessment and tympanometry, we found that 70% of patients had alterations in the CLE. Our study was consistent with many previous studies that there was an increased risk of COM in the CLE of unilateral COM. [ABSTRACT FROM AUTHOR]

The value of chest computed tomography (CT) in pediatric primary spontaneous pneumothorax (PSP) remains controversial. This study sought to evaluate the utility of CT scans in a contemporary cohort of children with PSP. An institutional review board approval was obtained for a retrospective review of all children (aged ≤18 y) who underwent video-assisted thoracoscopic surgery (VATS) for PSP between 2009 and 2019 at a university-affiliated pediatric hospital. Preoperative CT scans were evaluated for diagnostic accuracy of the CT of bleb disease. Thirty nine patients underwent VATS procedures for PSP, 34 (87%) of the patients were noted to have blebs. Twenty eight (72%) patients received preoperative CT scans with a 5.5:1 male to female ratio. On CT, 17 (61%) were diagnosed with blebs and all had blebs intraoperatively. CT did not identify disease in 11 patients, but seven had blebs intraoperatively. The positive and negative predictive values of preoperative CT for detecting ipsilateral bleb disease were 100% and 36%, respectively, with a sensitivity of 71%. Eleven patients had a contralateral disease on CT (39%). Five received elective contralateral VATS and three developed spontaneous PSP, with intraoperative blebs in all eight patients. Three never developed contralateral PSP. Six (21%) patients with no contralateral disease on CT developed spontaneous PSP with intraoperative blebs. The decision to operate for PSP should be made based on clinical findings rather than on the presence or absence of blebs identified by CT. • Primary spontaneous pneumothorax (PSP) is thought to be related to ruptured blebs and some have used evidence of blebs on imaging as an indication for surgical resection. • Computed tomography (CT) is only 71% sensitive and 36% negative predictive value for bleb disease. • Blebs on CT do not correlate with ipsilateral or contralateral recurrence rates. • CT utility for PSP is debated with low yield and increased risk of radiation and cost. [ABSTRACT FROM AUTHOR]

Purpose: When laparoscopically repairing a symptomatic inguinal hernia, surgeons will discover a contralateral asymptomatic hernia in 22% of patients. It is estimated 30% of asymptomatic hernias become symptomatic and require repair. Thus, should they be repaired in a 2-for-1 operation? The main purpose is to examine the evidence and make a recommendation for the need to repair the contralateral asymptomatic inguinal hernia prophylactically in the adult population during unilateral inguinal hernia presentation. Method: A systematic literature search was conducted up to 15 February 2021 using PubMed and the Cochrane Library. Management pathway taken, mean operating time, duration of follow-up, pain, duration of hospital stay and perioperative complications were extracted. Risk of bias was assessed using the ROBINS-I tool. Results: Six non-randomised studies (1774 patients) were included; 978 patients had both hernias repaired, 796 patients had only the symptomatic hernia repaired. There was no significant difference in length of hospital stay, return to activities of daily living nor complications. Mean operating time was slightly lower for patients who had unilateral hernia repair (mean difference = − 14.57 min, 95%CI − 25.59, − 3.45). Reported pain scores were lower for patients who only had one hernia repaired (− 0.33 units, 95%CI − 0.48, − 0.18). The overall risk of bias for the six studies were low-to-moderate risk. Conclusion: Asymptomatic inguinal hernias can be repaired when found. While there is minimal increase in operation time and pain, no significant difference to total hospital stay. Importantly, this is likely to prevent the need for another operation in almost a third of patients. [ABSTRACT FROM AUTHOR]

Delayed endolymphatic hydrops (DEH) is an inner ear disease that causes recurrent vertigo in the ipsilateral ear or fluctuating hearing in the contralateral ear due to endolymphatic hydrops secondary to preceding deafness. There are few reports of large, multicentre studies investigating the clinical-epidemiological characteristics of DEH. This study aimed to clarify the characteristics of DEH in Japan. Clinical data on 662 patients with DEH were analysed by nationwide, multicentre surveys conducted by the Peripheral Vestibular Disorders Research Group of Japan. The proportion of ipsilateral DEH (IDEH) was slightly higher than that of contralateral DEH (CDEH) at 55.4%. The time delay between onset of precedent deafness and onset of DEH was significantly longer for CDEH than for IDEH. The most common cause of precedent deafness was a disease of unknown cause with onset in early childhood (33.1%). Epidemiological characteristics were not significantly different between CDEH with and without vertigo. DEH appearing to be caused by viral labyrinthitis has a high rate of onset within 40 years of precedent deafness. Clinical and epidemiological characteristics of IDEH, CDEH with vertigo, and CDEH without vertigo were very similar. The clinical-epidemiological characteristics of DEH in Japan were clarified. [ABSTRACT FROM AUTHOR]

Introduction The aim of this study was to compare clinical results of bilateral decompression and laminotomy and contralateral laminotomy following discectomy from the same side in patients who have far lateral disk herniation and lumbar spinal stenosis at the same level. Materials and Methods Twenty-four patients with far lateral disk herniation have been divided into two groups: group 1 (n = 14), those who have been through bilateral canal decompression with far lateral discectomy and ipsilateral approach, and group 2 (n = 10), those who have been through far lateral discectomy and bilateral decompression with unilateral approach from contralateral side. Early postoperative, 1st month, and 12th month back and leg pain Visual Analogue Scale (VAS) scores of the patients have been retrospectively evaluated. Results There is no significant difference between 1st month back and leg pain VAS scores of the groups. But 12th month back and leg pain VAS scores of group 1 are significantly higher than 1st month VAS scores. Also, 12th month back and leg pain VAS scores of group 1 are significantly higher than group 1. In the scanning carried out when the complaints of eight patients in group 1 continued, pars interarticularis fracture has been observed on the side where the surgery has been performed (57.1%). Six of these eight patients have been through stabilization surgery (42.8%). Conclusion Long-term postoperative results are better in cases who have been performed bilateral decompression with unilateral approach from contralateral side with median incision following paramedian incision discectomy in patients with far lateral disk herniation and spinal stenosis.

The current study aimed to examine the effects of clinicopathological factors, including the region, midline involvement, T classification, histological grade, and differentiation of the tumor on the rate of contralateral lymph node metastasis for oral squamous cell carcinoma and to assess their effects on survival rates. A total of 331 patients with intraoral squamous cell carcinomas were included. The influence of tumor location, T status, midline involvement, tumor grading, and the infiltration depth of the tumor on the pattern of metastasis was evaluated. Additionally, the effect of contralateral metastases on the prognosis was examined. Metastases of the contralateral side occurred most frequently in squamous cell carcinomas of the palate and floor of the mouth. Furthermore, tumors with a high T status resulted in significantly higher rates of contralateral metastases. Similarly, the midline involvement, tumor grading, existing ipsilateral metastases, and the infiltration depth of the tumor had a highly significant influence on the development of lymph node metastases on the opposite side. Oral squamous cell carcinomas require a patient-specific decision. There is an ongoing need for further prospective studies to confirm the validity of the prognostic factors described herein.

Purpose: To evaluate factors affecting the risk of contralateral anterior cruciate ligament reconstruction (ACLR) within 5 years of primary ACLR. Methods: Primary ACLRs performed at Capio Artro Clinic, Stockholm, Sweden, during the period 2005–2014, were reviewed. The outcome of the study was the occurrence of contralateral ACLR within 5 years of primary ACLR. Univariable and multivariable logistic regression analyses were employed to identify preoperative [age, gender, body mass index (BMI), time from injury to surgery, pre-injury Tegner activity level], intraoperative [graft type, medial meniscus (MM) and lateral meniscus (LM) resection or repair, cartilage injury] and postoperative [limb symmetry index (LSI) for quadriceps and hamstring strength and single-leg-hop test performance at 6 months] risk factors for contralateral ACLR. Results: A total of 5393 patients who underwent primary ACLR were included. The incidence of contralateral ACLR within 5 years was 4.7%. Univariable analysis revealed that age ≥ 25 years, BMI ≥ 25 kg/m2, time from injury to surgery ≥ 12 months and the presence of a cartilage injury reduced the odds, whereas female gender, pre-injury Tegner activity level ≥ 6, quadriceps and hamstring strength and a single-leg-hop test LSI of ≥ 90% increased the odds of contralateral ACLR. Multivariable analysis showed that the risk of contralateral ACLR was significantly affected only from age ≥ 25 years (OR 0.40; 95% CI 0.28–0.58; P < 0.001), time from injury to surgery ≥ 12 months (OR 0.48; 95% CI 0.30–0.75; P = 0.001) and a single-leg-hop test LSI of ≥ 90% (OR 1.56; 95% CI 1.04–2.34; P = 0.03). Conclusion: Older age (≥ 25 years) and delayed primary ACLR (≥ 12 months) reduced the odds, whereas a symmetrical (LSI ≥ 90%) 6-month single-leg-hop test increased the odds of contralateral ACLR within 5 years of primary ACLR. Knowledge of the factors affecting the risk of contralateral ACLR is important when it comes to the appropriate counselling for primary ACLR. Patients should be advised regarding factors affecting the risk of contralateral ACLR. Level of evidence: Level III. [ABSTRACT FROM AUTHOR]