| umls-concept:C0431111 | skos:definition | NCI: An aggressive malignant mesenchymal neoplasm of the nervous system or soft tissues. It is characterized by the presence of a sarcomatous component (most often rhabdomyosarcoma) and a ganglionic or a neuroectodermal component.,NCI: A rare, fast-growing tumor of the nervous system or soft tissue that occurs in children and young adults. Ectomesenchymomas may form in the head and neck, abdomen, perineum, scrotum, or limbs. | lld:umls |
