The PET- Retroperitoneal Sarcoma Study

"Standard of care includes a baseline PET-CT and conventional CT after 2 cycles of neoadjuvant chemotherapy, and after 5-6 cycles, of neoadjuvant chemotherapy, as per current practice/ standard of care.~Patients that enroll in the trial will receive two additional PET MRI scans- one at baseline and one after 1 cycle of chemotherapy"