article_metadata: Xiaoqian Zhai Jiewei Liu Zuoyu Liang Zhixi Li Yanyang Liu Lin Huang Weiya Wang Feng Luo
article_metadata: 10.3389/fonc.2021.661034
article_metadata: Front Oncol
article_metadata: 2021 Jun 24;11:661034.
article_metadata: epidermal growth factor receptor mutation high pd-l1 expression immunotherapy resistance lung adenocarcinoma small cell cancer transformation targeted therapy resistance tyrosine kinase inhibitors
article_metadata: CC BY
article_metadata: https://pubmed.ncbi.nlm.nih.gov/34249697/
article_metadata: Case Reports
article_metadata: PMC8264361
article_metadata: 34249697
article_metadata: Case Report: Re-Sensitization to Gefitinib in Lung Adenocarcinoma Harboring EGFR Mutation and High PD-L1 Expression After Immunotherapy Resistance, Which Finally Transform Into Small Cell Carcinoma
article_metadata: 2021