Sunitinib and Radiation in Patients With Resectable Soft-tissue Sarcoma

Sunitinib dose 50 mg/day orally for 2 weeks prior to radiotherapy. Treatment Dose Levels during radiotherapy: Dose level 0: Sunitinib 50mg/day for 2 weeks prior to radiotherapy, followed by 25mg/day given concurrently with radiotherapy; Dose level 1: Sunitinib 50mg/day for 2 weeks prior to radiotherapy, followed by 37.5mg/day given concurrently with radiotherapy; Dose level -1: Sunitinib 37.5mg/day for 2 weeks prior to radiotherapy, followed by 37.5mg/day given concurrently with radiotherapy. Dose escalation/de-escalation: first 6 patients will be accrued at dose level 0. The dose levels at which subsequent patients will be accrued will be determined using a dose modification schedule.

Preoperative radiotherapy consisting of external beam radiotherapy at a dose of 50.4 Gy given in 28 fractions, five days a week, over five weeks and 3 days to the planning target volume.