移行上皮癌を合併した膀胱平滑筋肉腫の1例

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74歳男.血尿を主訴に受診し,膀胱鏡で腫瘤を認めた.腹部骨盤CTで膀胱前壁に径5cm大の,膀胱左側壁に径1cm大の内腔へ突出する腫瘤を認めた.所見より,浸潤性膀胱癌T3bN0M0と診断し,病理組織所見のため,TURBTを施行した.移行上皮癌を併発した,膀胱平滑筋肉腫で,術後6ヵ月後に死亡した.剖検で多発性肺転移,骨盤内を占拠する局所再発を認めたA 74-year-old man was admitted for asymptomatic macroscopic hematuria. He had undergone transurethral resection of bladder tumor (TURBT) due to transitional cell carcinoma 30 years ago. Pelvic CT showed two invasive bladder tumors. A 5 cm tumor was on the dome and a 1 cm tumor was on the left lateral wall. TURBT was performed. Pathological examination revealed that they were leiomyosarcoma and transitional cell carcinoma. Radical cystectomy plus bilateral cutaneousureterostomy was performed. He died of lung metastases and local recurrence after 6 months.