rhabdomyosarcoma with mixed embryonal and alveolar features https://www.malacards.org/card/mixed_type_rhabdomyosarcoma rhabdomyosarcoma with mixed embryonal and alveolar features GARD:0023280 A rhabdomyosarcoma composed of embryonic and alveolar components. It is characterized by the presence of spindle cells with myoblastic differentiation, a myxoid stroma, and fibrous septa. These tumors were previously considered variants of alveolar rhabdomyosarcoma. The lack of PAX3-FOXO1 fusions in most of these tumors suggests that are biologically and clinically related to embryonal rhabdomyosarcoma. NCIT:C4259 mixed type alveolar rhabdomyosarcoma UMLS:C1709053 mixed alveolar rhabdomyosarcoma ICDO:8902/3 MEDGEN:313444 MONDO:0002863 DOID:4065 rhabdomyosarcoma