The current meta-analysis showed a moderate sensitivity and specificity of 18F-FDG PET/CT for the prediction of PD-L1 expression in NSCLC patients. The DOR was low and the likelihood ratio scattergram indicated that 18F-FDG PET/CT might not be useful for the prediction of PD-L1 expression in NSCLC patients and not for its exclusion. What this study adds This study concluded that the role of 18F-FDG PET/CT in predicting tumor expression of PD-L1 should be further elucidated.
  To validate the clinical applicability of knowledge-based (KB) planning in single-isocenter volumetric-modulated arc therapy (VMAT) for multiple brain metastases using the k-fold cross-validation (CV) method.
 
  This study comprised 60 consecutive patients with multiple brain metastases treated with single-isocenter VMAT (28Gy in five fractions). The patients were divided randomly into five groups (Groups 1-5). The data of Groups 1-4 were used as the training and validation dataset and those of Group 5 were used as the testing dataset. Four KB models were created from three of the training and validation datasets and then applied to the remaining Groups as the fourfold CV phase. As the testing phase, the final KB model was applied to Group 5 and the dose distributions were calculated with a single optimization process. The dose-volume indices (DVIs), modified Ian Paddick Conformity Index (mIPCI), modulation complexity scores for VMAT plans (MCSv), and the total number of monitor units (MUs) of the final KB plan were compared to those of the clinical plan (CL) using a paired Wilcoxon signed-rank test.
 
  In the fourfold CV phase, no significant differences were observed in the DVIs among the four KB plans (KBPs). In the testing phase, the final KB plan was statistically equivalent to the CL, except for planning target volumes (PTVs) D
  and D
  . The differences between the CL and KBP in terms of the PTV D
  , normal brain, and D
  to all organs at risk (OARs) were not significant. The KBP achieved a lower total number of MUs and higher MCSv than the CL with no significant difference.
 
  We demonstrated that a KB model in a single-isocenter VMAT for multiple brain metastases was equivalent in dose distribution, MCSv, and total number of MUs to a CL with a single optimization.
 We demonstrated that a KB model in a single-isocenter VMAT for multiple brain metastases was equivalent in dose distribution, MCSv, and total number of MUs to a CL with a single optimization.
  Depression becomes increasingly common in adolescence. Around 10%-20% of adolescents have a chronic illness, and they are more likely to experience depression. There is emerging evidence for cognitive behaviour therapy (CBT) interventions to treat depression in adolescents with chronic illnesses, yet no review has been undertaken of how these CBT interventions are delivered in practice.
 
  We conducted a scoping review to summarise how CBT has been delivered in adolescents with chronic illness and depression. We included studies that evaluated CBT aimed at treating depression/depressive symptoms in adolescents with chronic illness. Searches were carried out across Embase and PsycNET.
 
  Twelve studies met our inclusion criteria. These included diabetes (n=3), inflammatory bowel disease (n=3), polycystic ovary syndrome (n=2), chronic headache (n=1), chronic pain (n=1), chronic fatigue syndrome (n=1) and Fanconi anaemia (n=1). Adaptations made to the delivery of CBT included cognitive restructuring of illness-rcy and effectiveness of treatments for adolescent depression in this vulnerable population specifically.The present study aims to investigate the effects of 8 weeks of bed rest, with or without resistance exercise intervention, on the volumes of muscle tissue and the intramuscular, intermuscular, and subcutaneous adipose tissues of the thigh. Twenty men were included, who were randomly assigned in three groups resistance exercises group (RE group), resistance exercises with whole-body vibration group (VRE group), and nonexercise control group (CTR group). The RE and VRE groups performed resistance exercises during 8 weeks of bed rest (3 days per week). Additionally, consecutive axial magnetic resonance images were obtained before and after the bed rest. Using these images, the volumes of the muscle tissue and the intramuscular adipose tissue, intermuscular adipose tissue, and subcutaneous adipose tissue of the thigh were evaluated. No significant time-by-group interaction was observed the volumes of the muscle tissue and the intramuscular adipose tissue, intermuscular adipose tissue, and subcutaneous adipose tissue between the RE and VRE groups. Furthermore, the RE and VRE groups were pooled as the resistance exercise intervention group (TR group), wherein their thigh muscle tissue volume was observed to be maintained after the bed rest. However, that of the CTR group significantly decreased. Regarding the thigh intramuscular adipose tissue and intermuscular adipose tissue volumes, no significant difference was observed among the CTR and TR groups. Although subcutaneous adipose tissue volume in the CTR group significantly increased after the bed rest, no changes were observed in that of the TR group. Therefore, the results of the present study suggested that within the 8 weeks of bed rest, adipose tissue adaptation differs depending on the location.Identification of four new HLA-DPB1 alleles, DPB1*020157, *170104, *111701, *112401.Life-long sperm production leads to the assumption that male fecundity remains unchanged throughout life. However, recently it was shown that paternal age has profound consequences for male fertility and offspring health. Paternal age effects are caused by an accumulation of germ cell mutations over time, causing severe congenital diseases. Apart from these well-described cases, molecular patterns of ageing in germ cells and their impact on DNA integrity have not been studied in detail. In this study, we aimed to assess the effects of 'pure' ageing on male reproductive health and germ cell quality. We assembled a cohort of 198 healthy men (18-84 years) for which end points such as semen and hormone profiles, sexual health and well-being, and sperm DNA parameters were evaluated.  https://www.selleckchem.com/products/ly333531.html  Sperm production and hormonal profiles were maintained at physiological levels over a period of six decades. In contrast, we identified a germ cell-specific ageing pattern characterized by a steady increase of telomere length in sperm and a sharp increase in sperm DNA instability, particularly after the sixth decade.