label: MYOD1-Mutant Spindle Cell/Sclerosing Rhabdomyosarcoma
label_lc: myod1-mutant spindle cell/sclerosing rhabdomyosarcoma
description: "Spindle cell/sclerosing rhabdomyosarcoma characterized by the presence of MYOD1 p.Leu122Arg substitution mutation. This subtype includes most spindle cell/sclerosing rhabdomyosarcomas in adolescents and young adults, as well as some cases in older adults. It follows an aggressive clinical course."