A sarcoma containing large spindle cells of smooth muscle. Although it rarely occurs in soft tissue, it is common in the viscera. It is the most common soft tissue sarcoma of the gastrointestinal tract and uterus. The median age of patients is 60 years. (From Dorland, 27th ed; Holland et al., Cancer Medicine, 3d ed, p1865)|A malignant smooth muscle cancer that can arise almost anywhere in the body, but is most common in the uterus, abdomen, or pelvis.|An uncommon, aggressive malignant smooth muscle neoplasm, usually occurring in post-menopausal women. It is characterized by a proliferation of neoplastic spindle cells. Morphologic variants include epithelioid, granular cell, inflammatory and myxoid leimyosarcomas. (Experimental Factor Ontology, EFO_0000564)
20 genes associated with the leiomyosarcoma phenotype by mapping known disease genes to disease phenotypes from the HPO Gene-Disease Associations dataset.
