[Clinicopathological characteristics of lung adenocarcinoma with PIK3CA mutation].

Lung adenocarcinomas with PIK3CA mutations exhibit distinct clinicopathological characteristics in terms of gender, age, smoking history, differentiation degree, and clinical stage. Acquired drug resistance in lung adenocarcinoma may be accompanied by PIK3CA mutations, but PIK3CA mutation is not the main mechanism of targeted therapy resistance in lung adenocarcinoma patients.