article_metadata: Jiatao Liao Yuan Li Chang Liu Qianqian Long Jialei Wang
article_metadata: 10.3389/fonc.2021.696881
article_metadata: Front Oncol
article_metadata: 2021 Jun 8;11:696881.
article_metadata: egfr amplification egfr mutation histological transformation lung adenocarcinoma resistance to gefitinib targeted therapy
article_metadata: CC BY
article_metadata: https://pubmed.ncbi.nlm.nih.gov/34169002/
article_metadata: Case Reports
article_metadata: PMC8217822
article_metadata: 34169002
article_metadata: Case Report: EGFR-Positive Early-Stage Lung Adenocarcinoma Transforming to Squamous Cell Carcinoma After TKI Treatment
article_metadata: 2021