INTRODUCTION: Bronchiolar adenoma/ciliated muconodular papillary tumors (BA/CMPTs) are rare benign tumors. Because their radiological appearance often resembles that of small peripheral lung cancers, preoperative differentiation remains challenging. Furthermore, BA/CMPTs may be misdiagnosed as adenocarcinomas during intraoperative frozen-section consultations. Here, we report two cases of resected BA/CMPTs with distinct radiological morphologies and discuss their clinicopathological characteristics compared with those of previously reported cases.
Sugimoto et al. (Thu,) studied this question.