肺原発線毛性粘液結節性乳頭状腫瘍の1例

Ciliated Muconodular Papillary Tumor of the Lung：Report of a Case

はじめに　線毛性粘液結節性乳頭状腫瘍（CMPT）は，線毛上皮，粘液細胞，基底細胞の3種類の細胞が乳頭状結節状に増殖する境界明瞭なまれな肺腫瘍であり，最近では細気管支腺腫（bronchiolar adenoma）と称され1），近位型（proximal）と遠位型（distal）の2亜型に分けられている1）．われわれは近位型相当のCMPTの1例を経験したので報告する．

Ciliated muconodular papillary tumor （CMPT） is a rare true pulmonary tumor consisting of bronchiolar cellular elements. Although this tumor cannot be classified as benign or malignant, it is mostly believed to be a benign bronchiolar adenoma. Recently, CMPT has been divided into two subtypes：proximal and distal.

Herein, we report a case of a proximal type of CMPT containing abundant mucus cells in a 70-year-old woman. Thoracoscopic resection of the tumor in the left lower lobe was successfully performed, and the patient has been well without recurrence or metastasis for more than three years after surgery.