嚥下魚骨により発症したと考えられる尿膜管黄色肉芽腫の1例

Abstract

元来存在していた尿膜管嚢胞に, 誤嚥した魚骨が腸管穿孔して迷入し, 慢性炎症をきたして黄色肉芽腫の形成に至ったと考えられる30歳男の症例を報告した

A 30-year-old man was referred to our department with a complaint of bladder irritability and with development of high fever. Physical examination revealed a tender mass in the suprapubic area. Computed tomographic scan and magnetic resonance imaging indicated a cystic mass above the bladder dome, extending toward the umbilicus. Urachal abscess was suspected and the mass was excised en bloc with the urachus. The wall of the mass was thickened, and a linear foreign body was detected in the mass, which was considered to be a fish bone. Pathological diagnosis of the mass was xanthogranuloma. We speculated that a swallowed fish bone had penetrated the bowel and might have migrated into the urachal cyst, which induced a xanthogranulomatous change of the wall.