亜々区域支に発生した気管支内過誤腫の1例

Endobronchial Hamartoma of the Subsegmental Bronchus；Report of a Case

はじめに　肺過誤腫は肺良性腫瘍の中では頻度が高く，多くは末梢肺に発生する肺実質型で，気管支内過誤腫は比較的まれである．また，その多くは亜区域支より中枢に発生するといわれている．われわれは右B5aiの気管支壁を貫くように内腔および肺実質に伸展し，気管支を閉塞する気管支内過誤腫の1例を経験したので報告する．

The case was 56 years old male. An abnormal shadow was pointed out by chest computed tomography （CT） at a medical examination. The CT scan revealed a 13 mm mass shadow that contacts with the B5a of the right middle lobe. Bronchoscopy revealed a yellow colored lesion that occluded B5ai. A non-cartilage type endobronchial hamartoma was suspected and the biopsy was performed, but a definitive diagnosis was not achieved. The lesion was surgically resected by the right middle lobectomy, and the histopathological diagnosis was an endobronchial hamartoma consisting mainly of mature adipose tissue.