[Conservative treatment of a recurring retroperitoneal liposarcoma. Apropos of a case followed over 27 years].

We report about the case of a patient who, over 27 years, presented with seven local recurrences of a retroperitoneal liposarcoma. This evolution seems to characterize differentiated (adult and myxoid) forms of liposarcoma, for which metastatic expansion is less frequent that in the undifferentiated, pleiomorphic or round-cell forms. The treatment of these tumors is mainly surgical. Adjuvant radiation therapy might reduce the frequency of local recurrence.