Results
The resected tumor comprised pleomorphic tumor cells containing lipoblastic cells with vacuolated cytoplasms. Immunohistochemical analysis showed diffuse positivity for MDM2 in tumor cells. Histopathological diagnosis of the tumors was dedifferentiated liposarcoma (Fig. 3). On postoperative day 14, the patient was discharged and followed up without adjuvant chemotherapy or radiotherapy. He has survived for 8 years since the initial surgery and 2 years since the second surgery.