cell type benign neoplasm leiomyoma A cell type benign neoplasm that is a benign tumor of smooth muscle cells. DOID:127 MESH:D007889 NCI:C3157 SNOMEDCT_US_2016_03_01:189787000 SNOMEDCT_US_2016_03_01:189788005 SNOMEDCT_US_2016_03_01:189793008 SNOMEDCT_US_2016_03_01:702978006 UMLS_CUI:C0023267 disease_ontology leiomyomatous neoplasm (morphologic abnormality) leiomyomatous tumor