Use of extent surgery via intraperitoneal route to improve iliopsoas sarcoma local control.

e20508 Background: Sarcomas of the iliopsoas compartment exhibit high local recurrence rates because it is one of the most inaccessible areas. Methods: We analyzed all iliopsoas soft tissue sarcomas addressed for surgery in our institution from 1997 to 2010 in a prospective data base. Surgical technique and histological specimens were prospectively evaluated. Concerning primaries, the endpoints were local recurrence, distant metastasis and overall survival (OS) analyzed by Cox model. Results: There were 32 patients (pts): 29 primaries (including 8 second extended resection after initial unplanned surgery) and 3 recurrences. Mean tumor size (cm) was 14.5 (12 -17) French Sarcoma Group grades were: 1 (n=10), 2 (n=9), 3 (n=12). Histological subtypes were liposarcoma n=12, leio and rhadomyosarcoma n=8, MPNST n=4, others n=8. Main symptoms were femoral palsy (n=10) and palpation of a mass (n=16). Twenty two pts received neoadjuvant treatment (17 chemotherapy, 5 radiotherapy), with 10 objective responses. Intrap...