[A Case of Symptomatic Giant Retroperitoneal Intramuscular Lipoma with Clinically Suspected Well-Differentiated Liposarcoma].

Lipoma and well-differentiated liposarcoma are clinically differentiated by site of origin and length, and pathologically differentiated by immunostaining with MDM2 and CDK4. An 82-year-old male patient. A retroperitoneal lipomatous tumor which compressed intraabdominal organs was found on CT and MRI scan. Laparotomy for retroperitoneal tumor resection was performed. Lipomatous tumor more than 10…