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Title: Case Report: A Case Report of a Histological Transformation of ALK-Rearranged Adenocarcinoma With High Expression of PD-L1 to Squamous Cell Carcinoma After Treatment With Alectinib. Author: Zhang Y, Qin Y, Xu H, Yao Q, Gao Y, Feng Y, Ren J. Journal: Pathol Oncol Res; 2021; 27():637745. PubMed ID: 34257603. Abstract: We report an anaplastic lymphoma kinase (ALK)-positive patient shows a poor response to the ALK inhibitor alectinib due to the high expression of programmed death-ligand 1 (PD-L1). After treatment with alectinib, the pathological form changed from adenocarcinoma into squamous cell carcinoma without novel genetic changes. This case may reveal a direct relationship between ALK mutation and a high level of PD-L1 expression.[Abstract] [Full Text] [Related] [New Search]