Efficacy and Safety of Regorafenib as Maintenance Therapy After First-line Treatment in Patients With Bone Sarcomas

Randomized, non-comparative, multicentre exploratory phase II study. Two arms concerning patients with bone sarcoma after the first line therapy: in the first arm, patients will be treated with Regorafenib for a maximum of 12 months as maintenance therapy after first line therapy, whereas in the second arm, patients will be kept under surveillance (standard of care). Regardless of their study arm, all the patients will be followed up until end of the study. The comparison between these two arms will allow to determine whether or not regorafenib is efficient for disease control, in terms of Relapse-Free Survival improvement.