Rhabdomyosarcomas have been described in association with thyroid disease, dermatomyositis, Duchenne muscular dystrophy, and dystrophy models but not patients ryanodine receptor-1 gene (RYR1) pathogenic variants. We here an 18-year-old male who reported a cervical nodule. Magnetic resonance images revealed mass the ethmoidal sinus corresponding to rhabdomyosarcoma. As his father died from malig...