Case Report
Squamous cell carcinoma transformation from adenocarcinoma as an acquired resistance after the EGFR TKI therapy in (EGFR-mutated) non-small cell lung cancer
Abstract
Lung cancer remains the leading cause of cancer mortality worldwide. The incidence of recurrence or distant metastasis after complete resection of primary tumors is reported to be 37%, even in patients with stage I non-small cell lung carcinoma (NSCLC) (1).