[Retroperitoneal pleomorphic liposarcoma. A case of survival after ten years]

Sarcomas are malignant neoplasms which can involve both soft tissues and/or bones. The soft tissues sarcomas are very rare, representing about 1% of all malignant tumors. In the resectable cases, histologic grading, site and dimensions of tumor influence recurrence and survival rates. Currently, surgery is the only curative therapy for soft tissues sarcomas in adult patients, with the exclusion of retroperitoneal sarcomas, which have have poor prognosis, due to look of surgical radicality and low radiotherapy and chemotherapy responsiveness. In fact, chemotherapy by conventional regimens, as adriamicine plus ifosfamide or CYVADIC, allows not more than 25% of partial responses, with a median survival of 12 months.