Source:http://linkedlifedata.com/resource/umls/id/C1306573
NCI: A primitive malignant soft tissue sarcoma that recapitulates the phenotypic and biological features of embryonic skeletal muscle. In addition, there are linear aggregates of tumor cells that tightly abut an epithelial surface. There are variable numbers of polypoid nodules, often with an abundant, loose myxoid stroma.,NCI: A morphologic variant of embryonal rhabdomyosarcoma arising from organs with a mucosal epithelial surface. It is characterized by the formation of a cambium layer in the affected tissue and polypoid nodules within an abundant myxoid stroma.