Date of an examination of 60 patients with liposarcomas of the retroperitoneal space aged from 40 to 60 are presented, women comprised 62%, men 38%. Operative treatment was undertaken in 48 patients (96%), radical operation--in 82%, palliative operations--in 14%. Recurrent tumors were revealed in 33 patients (66%), metastases--in 8%. Most frequent recidivations were noted in myxoid liposarcomas. A complete removal of the recurrent tumor was made in 72% of the cases. Out of 50 patients with liposarcomas 54.2% of the patients survived 5 or more years after the operation, in the myxoid variant--72.3%, in polymorphocellular form--23.1%.