Phase 3 Study of Chemotherapy for Children and Young Adults With Very Low-Risk and Low-Risk Fusion Negative Rhabdomyosarcoma

What this Trial Is About

Researchers are studying very low-risk and low-risk fusion negative rhabdomyosarcoma, a type of soft tissue cancer, to maintain excellent treatment outcomes while reducing therapy burdens. This phase III trial also evaluates how well patients with certain DNA mutations respond to different chemotherapy regimens and examines the use of centralized molecular risk stratification in treatment planning. The study aims to improve outcomes by adjusting therapy intensity based on molecular features. Patients are assigned to one of three treatment regimens based on their risk level and mutation status. Very low-risk patients receive vincristine and dactinomycin over 24 weeks in 8 cycles. Low-risk patients receive 12 weeks of vincristine, dactinomycin, and cyclophosphamide followed by 12 weeks of vincristine and dactinomycin, totaling 8 cycles. Patients with MYOD1 or TP53 mutations switch to an intensified 12-13 cycle regimen including vincristine, dactinomycin, and cyclophosphamide. Radiation therapy may be given at cycle 5 for some patients. Treatments are administered intravenously every 21 days. Throughout the study, participants undergo CT scans, MRI, bone scans, PET scans, and tumor biopsies to monitor disease status. Blood and tissue samples are collected at various times for research purposes. Researchers measure failure-free survival and overall survival over several years to assess treatment success. The trial lasts up to five years with ongoing assessments to track patient outcomes and safety.

Chemotherapy for the Treatment of Patients With Newly Diagnosed Very Low-Risk and Low Risk Fusion Negative Rhabdomyosarcoma