Leiomyoma [Disease/Finding] Leiomyoma M0012316 N0000001802 Fibroid Leiomyoma D007889 189793008 189787000 A benign tumor derived from smooth muscle tissue, also known as a fibroid tumor. They rarely occur outside of the UTERUS and the GASTROINTESTINAL TRACT but can occur in the SKIN and SUBCUTANEOUS TISSUE, probably arising from the smooth muscle of small blood vessels in these tissues. Fibroid Tumor 189788005 C0023267 Fibromyoma C3782 1024283 Neoplasms, Muscle Tissue [Disease/Finding]