MRIが術前診断に有用であった後腹膜線維肉腫の1例

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呼吸困難を主訴とした62歳男で,CTは大きい右腎腫瘤を描出した.MRIのT1及びT2強調像では内部に非常に低い信号域を認め,後腹膜線維肉腫を示唆した.腫瘍の完全切除及びリンパ節郭清を行った.組織学的診断は線維肉腫であった.術後,シクロホスファミド,ビンクリスチン,アドリアマイシン,及びダカルバジンより成る組み合わせ化学療法を2回行った.術後1年に局所再発も遠隔転移もなく元気であるA 62-year-old man with dyspnea was admitted to our hospital. Computed tomography showed a large right renal mass. Results of T1- and T2- weighted magnetic resonance imaging showed a very low-intensity region suggestive of retroperitoneal fibrosarcoma. On March 13, 1996, complete tumor resection and lymphadenectomy were done. The histopathological diagnosis was of fibrosarcoma. After the operation, the patient was treated twice with a combination chemotherapy regimen consisting of cyclophosphamide, vincristine, adriamycin and dacarbazine. At the most recent follow-up, 1-year postoperatively, the patient was well with no local recurrence or distant metastases.