<unk>  <unk>  is a rare histological form of cancer of connective tissue wherein the mesenchymally-derived malignant cells resemble the primitive developing skeletal muscle of the embryo. It is the most common soft tissue sarcoma occurring in children.<unk>  is also known as Fusion-Negative rhabdomyosarcoma (FN-RMS), as tumors of this subtype are unified by their lack of a PAX3-FOXO1 fusion oncogene (or other PAX fusions seen in alveolar rhabdomyosarcoma).
Embryonal rhabdomyosarcoma
Endodermal sinus tumor
Primitive neuroectodermal tumor
Malignant rhabdoid tumour
Immature teratoma
Germ cell tumor
Neurofibroma
Sclerosing rhabdomyosarcoma