title: [Retroperitoneal liposarcoma: a report of 2 cases and review of 163 cases in Japan].
abstract: Two cases of retroperitoneal liposarcoma are reported. Case I was a 71-year-old-male presenting with a mass in the left abdomen. On X-ray examination, a large extrarenal tumor was found in the left retroperitoneal space. The tumor appeared to invade the psoas muscle and the aorta. Exploratory laparotomy was carried out. The histological diagnosis of the tumor was myxoid-type liposarcoma. He died of the disease. Case 2 was a 44-year-old-male who presented with a mass in the left abdomen. On X-ray examination, a large tumor was found in the left retroperitoneal space, and left kidney and the descending colon were markedly displaced by the tumor. Excisional surgery was carried out. The tumor was almost completely removed. The histological diagnosis was myxoid-type liposarcoma. A combination chemotherapy (actinomycin D, vincristine, cyclophosphamide) was started. but soon switched to radiation therapy because of liver dysfunction. Four months following the operation, there is no evidence of residual disease. One hundred sixty three cases of retroperitoneal liposarcoma reported in Japan are reviewed.
mesh_terms: D000328:Adult; D000368:Aged; D003131:Combined Modality Therapy; D006801:Humans; D007564:Japan; D008080:Liposarcoma / Q000453:epidemiology / Q000473:pathology* / Q000628:therapy; D008297:Male; D012186:Retroperitoneal Neoplasms / Q000453:epidemiology / Q000473:pathology* / Q000628:therapy