膀胱後部脂肪肉腫の1例

Abstract

41歳男に発生した膀胱後部脂肪肉腫.膀胱後部より発生した脂肪肉腫としては本邦で5例目と思われた.骨盤内臓全摘術を行った後, 第1胸椎に転移巣が出現し, 放射線療法を施行したが無効であった.現在全身化学療法を施行中である

A case of retrovesical liposarcoma is reported. The patient was a 41-year-old man who complained of left scrotal pain and of hip discomfort. Digital rectal examination revealed a hen's egg-sized mass with an elastic hard consistency at the left side of the normal prostate. Pelvic CT and MRI showed a heterogeneous tumor in the retrovesical region. Transperineal biopsy revealed liposarcoma. Pelvic exenteration, colostomy and ileal conduit were performed. The resected weight was 1, 680 grams, and the histopathological diagnosis was myxoid type of liposarcoma, grade II. Postoperatively, a metastatic lesion to vertebrae thoracicae I developed causing radiculoneuropathy of the left superior limb. Spot radiation (50 Gy) was administered to the lesion, but there was no response. Currently, the patient is being treated with combination chemotherapy consisting of dacarbazine, vincristine, adriamycin, and cyclophosphamide. Cases of retrovesical liposarcomas reported in Japan are reviewed and discussed.