SARC038: Phase 2 Study of Regorafenib and Nivolumab in Osteosarcoma

For subjects age 18 and older, Regorafenib will be administered as 80mg oral once daily on Cycle 1, Days 1-7 and then escalated to 120 mg once daily for Cycle 1, Days 8-21 if no Grade 2 or above regorafenib adverse events occur. For subsequent cycles, the highest tolerated dose will be taken once daily on days 1-21 of each 28-day cycle.

For subjects younger than 18 years, Regorafenib will be administered as 60mg/m2/dose (rounded to the nearest 20mg, maximum dose of 80mg) once daily for Cycle 1, Days 8-21 if no Grade 2 or above regorafenib-related adverse events occur. For subsequent cycles, the highest tolerated dose will be taken once daily on days 1-21 of each 28-day cycle.

"For subjects age 18 and older, Nivolumab will be administered at 480mg IV over 30 min every 28 days.~For subjects younger than 18 years, Nivolumab 3mg/kg (maximum dose 240mg) will be administered IV over 30 minutes on day 1 and 15 of each 28-day cycle."