[A case of retroperitoneal fibrosarcoma].

A case of retroperitoneal fibrosarcoma is reported. An 81-year-old man was admitted to our hospital with gross hematuria. X-ray examination of intravenous pyelography, computed tomography and angiography revealed left hydronephrosis and left renal tumor. Excisional surgery was carried out. The tumor and left kidney were completely removed. Pathological diagnosis was retroperitoneal fibrosarcoma. Five months later, he died of lung and liver metastasis.