https://www.selleckchem.com/products/triparanol-mer-29.html This article is protected by copyright. All rights reserved.BACKGROUND Expression of programmed death ligand 1 (PD-L1) by cutaneous squamous cell carcinomas has been shown to correlate with advanced disease and risk of metastasis. Lymphocyte activation gene 3 (LAG-3) is an inhibitory receptor that interacts with the PD-L1 axis which has been shown to be a marker of immune exhaustion and a potential immunotherapy target. However, the role of LAG-3 in cutaneous squamous cell carcinoma has not been established. METHODS We reviewed 18 cases of locally advanced and/or metastatic cutaneous squamous cell carcinomas and assessed for PD-L1 expression, presence or absence of tumor-infiltrating lymphocytes (TILs), and expression of lymphocyte activation gene 3 (LAG-3, CD223) by TILs. RESULTS PD-L1 expression was present in 11 of 13 locally advanced primary tumors and 5 of 5 metastases. TILs were present in all 18 tumors, of which 14 cases were positive for LAG-3 expression. In positive cases, LAG-3 was expressed on average by 32% of TILs. CONCLUSIONS Advanced cutaneous squamous cell carcinomas frequently express PD-L1 and are associated with an inflammatory response. LAG-3 expression by TILs was identified in a majority of cases. Our findings suggest that LAG-3 positive tumor associated inflammatory cells may play a role in the development of advanced disease and offer another potential target for drug therapy. This article is protected by copyright. All rights reserved. This article is protected by copyright. All rights reserved.Monochorionic diamniotic twins occur in about 1 in 300 pregnancies. Compared with dichorionic twins, they face increased risks because of the shared circulation. In about 15%, an imbalance in blood exchange occurs, such as twin-twin transfusion syndrome and twin anemia polycythemia sequence. In this review, we summarize the latest evidence on the management of monochorionic diamniotic twin pr