69; P = 0.003]. The mean follow-up was 43.9 ± 36.8 months. The 5-year survival was significantly worse for the IMF deposition group (IMF 73.8% vs non-IMF 88.2%; P = 0.010). The multivariable Cox proportional hazard analysis showed that IMF deposition significantly predicted poor survival (hazard ratio 3.26, 95% CI 1.47-7.24; P = 0.004), unlike psoas muscle mass index and age. CONCLUSIONS Skeletal muscle quality, defined by IMF deposition, was an independent predictor of overall survival and postoperative activities of daily living dependence risk in patients undergoing surgery for ATAAD. Thus, IMF deposition may be an additional risk factor for estimating late outcomes of ATAAD surgery. © The Author(s) 2020. Published by Oxford University Press on behalf of the European Association for Cardio-Thoracic Surgery. All rights reserved.BACKGROUND Observational studies have shown a link between elevated body mass index (BMI) and the risk of polycystic ovary syndrome (PCOS). While Mendelian randomization (MR) studies in Europeans have suggested a causal role of increased BMI in PCOS, whether the same role is suggested in Asians has yet to be investigated. We used MR studies to infer causal effects using genetic data from East Asian populations. METHODS AND FINDINGS We performed a two-sample bidirectional MR using summary statistics from genome-wide association studies (GWAS) of BMI (with up to 173,430 individuals) and PCOS (4,386 cases and 8,017 controls) in East Asian populations. Seventy-eight single nucleotide polymorphisms (SNPs) correlated with BMI were selected as genetic instrumental variables to estimate the causal effect of BMI on PCOS using the inverse-variance weighted (IVW) method. To test the reliability of the results, further sensitivity analyses included MR-Egger regression, weighted median estimates, and leave-one-out analysis. The IVW analysis indicated a significant association between high BMI and the risk of PCOS (odds ratio (OR) per-SD higher BMI, 2.208; 95% Confidence interval (CI) 1.537 to 3.168, P=1.77×10-5). In contrast, the genetic risk of PCOS had no significant effect on BMI. CONCLUSIONS The results of our bidirectional MR study showed that an increase in BMI causes PCOS, while PCOS does not cause an increased BMI. This study provides further genetic support for a link between BMI and PCOS. Further research is needed to interpret the potential mechanisms of this association. © Endocrine Society 2020. All rights reserved. For permissions, please e-mail journals.permissions@oup.com.BACKGROUND Although the prognosis of childhood cancer survivors has increased dramatically during recent years, chemotherapy and radiation treatments for cancer and other conditions may lead to permanent infertility in prepubertal boys. click here Recent developments have shown that spermatogonial stem cell (SSC) transplantation may be a hope for restoring fertility in adult survivors of childhood cancers. For this reason, several centres around the world are collecting and cryopreserving testicular tissue or cells anticipating that, in the near future, some patients will return for SSC transplantation. This review summarizes the current knowledge and utility of SSC transplantation techniques. OBJECTIVE AND RATIONALE The aim of this narrative review is to provide an overview of the currently used experimental injection techniques for SSC transplantation in animal and human testes. This is crucial in understanding and determining the role of the different techniques necessary for successful transplantation. SEARCH METHODs from multiple infusions through the rete testes. Overall, further optimization is required to increase the efficiency and safety of the infusion method. WIDER IMPLICATIONS Identifying a favourable injection method for SSC transplantation will provide insight into the mechanisms of successful assisted human reproduction. Future research could focus on reducing leakage and establishing the optimal infusion cell concentrations and pressure. © The Author(s) 2020. Published by Oxford University Press on behalf of the European Society of Human Reproduction and Embryology. All rights reserved. For permissions, please e-mail journals.permission@oup.com.OBJECTIVES This study aimed to investigate the long-term outcomes of perventricular device occlusion and surgical repair for doubly committed subarterial ventricular septal defect using propensity score matched analysis because previous comparative studies were limited by differences in the baseline characteristics. METHODS We reviewed inpatients with isolated doubly committed subarterial ventricular septal defect aged less then 18 years who underwent surgical repair or device occlusion between January 2011 and December 2017. Propensity score matching was used to assemble a cohort of patients with similar baseline characteristics. RESULTS A total of 336 patients underwent surgical repair; 99 underwent device occlusion. After matching, the repair group included 164 patients, whereas the device group had 91 patients. There were no significant differences in the baseline characteristics. The median follow-up periods were 46 and 58 months for the device and repair groups, respectively. No significant difference was noted in the rates of cumulative adverse events in the 2 groups (7.9% vs 5.5%; P = 0.61). The repair group required longer periods of hospitalization (P = 0.002) and mechanical ventilation (P = 0.016). No grade 3 or higher valvular regurgitation or high-degree atrioventricular block events were observed. All patients were in sinus rhythm at the last follow-up examination. CONCLUSIONS In selected patients with doubly committed subarterial ventricular septal defect, compared with conventional repair, perventricular device occlusion has comparable efficacy and safety, less invasiveness in terms of time in the hospital and on mechanical ventilation and avoidance of cardiopulmonary bypass. © The Author(s) 2020. Published by Oxford University Press on behalf of the European Association for Cardio-Thoracic Surgery. All rights reserved.Pulmonary artery (PA) aneurysm is a very rare complication of Behcet’s disease. We report on a 14-year-old boy with a giant left distal PA aneurysm caused by Behcet’s disease. A left thoracotomy was first performed to separate the aneurysm, but it was interrupted due to continuous and massive tracheorrhagia. We immediately converted to a median sternotomy and established cardiopulmonary bypass (CPB). The patient’s condition was stable; aneurysmectomy and left-down lobectomy were successfully performed. Results of the 2-year follow-up were favourable. Based on our experience, we recommend selecting CPB when performing surgery on patients with PAA, especially those with Behcet’s disease. © The Author(s) 2020. Published by Oxford University Press on behalf of the European Association for Cardio-Thoracic Surgery. All rights reserved.