Liposarcoma is a rare soft-tissue tumor. According to Enzinger, there are 5 subgroups. Histological criteria, carcinogenesis, diagnosis and therapy of this tumor are represented. Results have been ascertained as follows, founded on 8 cases. Adequate radical surgery and radiation therapy are needed in each case. Recurrences are frequent, metastases are rare. The prognosis is poor if a recurrence appears within 2 yr.