術前に肺腺癌との鑑別困難であったbronchiolar adenoma/ciliated muconodular papillary tumorの1例

Bronchiolar adenoma/ciliated muconodular papillary tumor of the lung：a case report

bronchiolar adenoma/ciliated muconodular papillary tumor（BA/CMPT，細気管支腺腫/線毛性粘液結節性乳頭状腫瘍）は肺末梢に発生し，粘液産生を伴い線毛細胞と杯細胞が肺胞置換性に乳頭状増殖を示すまれな良性腫瘍である。今回，左肺下葉末梢のBA/CMPTの1例を経験したので若干の文献的考察を加え報告する。

Bronchiolar adenoma/ciliated muconodular papillary tumor（BA/CMPT）is a rare benign tumor that develops in the peripheral lung and shows alveolar replacement papillary growth of fimbria and goblet cells with mucus production. We report a case of a man in his 50 s with BA/CMPT. Computed tomography（CT）revealed a 10 mm-sized solid nodule in the lower left lobe S9. Three months later, the nodule had no shrinking trend so lung cancer was suspected. Partial resection was performed under thoracoscopic surgery, and the pathological diagnosis was BA/CMPT. No recurrence was observed 7 months after the operation.