conventional leiomyosarcoma https://www.malacards.org/card/conventional_leiomyosarcoma conventional leiomyosarcoma classic leiomyosarcoma MONDO:0003348 DOID:5253 An uncommon, aggressive malignant smooth muscle neoplasm. It is characterized by the presence of atypical large spindle or round cells, nuclear palisading, tumor cell necrosis, mitotic figures and may be associated with vascular invasion. GARD:0023464 UMLS:C1333157 NCIT:C9428 MEDGEN:232394 leiomyosarcoma