Comparing Higher Dose Chemotherapy Over Shorter Time to Lower Dose Chemotherapy Plus Maintenance in Newly Diagnosed Intermediate-Risk Rhabdomyosarcoma Patients

What this Trial Is About

Researchers are comparing two chemotherapy treatment plans for patients with newly diagnosed intermediate-risk rhabdomyosarcoma, a type of soft tissue cancer. This phase III trial evaluates whether a higher dose chemotherapy over a shorter time Regimen A is better than a lower dose chemotherapy followed by maintenance treatment over a longer time Regimen B, both combined with standard surgery and radiation. The study also aims to assess survival rates, treatment side effects, and molecular features of the tumor. Participants are randomly assigned to one of two treatment groups. Regimen A involves multiple cycles of vincristine, dactinomycin, and cyclophosphamide given intravenously every 21 days, with possible surgery during week 12 and radiation treatments during specified cycles. Regimen B includes alternating cycles of vincristine, dactinomycin, cyclophosphamide, and irinotecan, followed by 24 weeks of maintenance chemotherapy with vinorelbine and oral cyclophosphamide. Both groups undergo imaging scans and biopsies as needed during treatment. Throughout the study, participants will have regular CT or MRI scans and blood tests, along with other procedures such as lymph node biopsies, bone marrow tests, and lumbar punctures to monitor disease status. After treatment, follow-up visits occur every 3 months for the first year, then less frequently up to 5 years to check for event-free survival and overall health. The trial also collects biospecimens for future research and evaluates treatment effects on fertility and quality of life.

A Study Comparing Higher Dose Chemotherapy Over a Shorter Amount of Time to Lower Dose Chemotherapy Plus Maintenance Over a Longer Amount of Time in Patients With Newly Diagnosed Intermediate-Risk Rhabdomyosarcoma (IR RMS)