Metastatic soft tissue sarcomas (STS) in elderly patients: 18 years of monoinstitutional experience

e22528 Background: Elderly people represent more than 50% of STS patients, but few data are available in this population and old patients in clinical studies are underrepresented or not included. Aim of this retrospective, monoinstitutional study is to describe the activity and feasibility of first and second line chemotherapy in elderly patients with metastatic STS. Methods: Patients older than 65, with metastatic STS of the scalp, trunk, girdles and extremities, treated and followed from February 1998 to December 2015 in an Italian referral Center for diagnosis and care of STS were included. Median Overall survival (OS) was the principal end point calculated from the start of chemotherapy to the last date of follow up or death. Response rate and toxicities related to type of administered chemotherapy were the secondary end points. Results: 134 patients (79 M, 55F) were considered, (65-70 y) 63%, (71- 75y) 25%, ( > 76 y)11% . STS histologies: mixoid and round cell liposarcomas (34%), leiomyosarcomas (25%), pleomorphic undifferentiated sarcomas (13%), Angiosarcoma (10%), Mixofibrosarcoma (6%), MPNST (4%), synovial sarcoma (2%), other histologies (6%). All the patients received at least one course chemotherapy (1-12). Mono CT was the preferred administered schedule (92%of cases). Median OS was 7.3 months; at the time of this analysis only 14 patients were alive (10%). In the first line therapy we recorded 1 CR, 14 PR and 43 SD. In second line therapy no CR, 4 PR, 23 SD. PR were recorded mainly in 65-70y old patients. Bad PS, low score in Comprehensive Geriatric Assesment (CGA), vulnerability, comorbidities, number of metastasis, were negative prognostic factors. No toxic death were recorded. 12% of the pts were recovered for febrile neutropenia, thrombocitopenia and mucositis . Conclusions: Our study confirms that elderly patients with metastatic STS is a difficult population to be treated. Only patients less aged, good PS, good GCA and 0-1 comorbidities can be treated with full dose of drug, generally with mono CT. Chemotherapy in elderly pts doesn’t produce a significant improvement in Median Survival and benefit observed support the routine use of citotoxic treatment in selected good performance status population.