What is "leiomyoma"

n. (context pathology English) A non-cancerous tumor of smooth muscle.

n. benign tumor of smooth muscle (usually in the uterus or digestive tract)

A leiomyoma, also known as fibroids, is a benign smooth muscle tumor that very rarely becomes cancer (0.1%). They can occur in any organ, but the most common forms occur in the uterus, small bowel, and the esophagus. Polycythemia may occur due to increased erythropoietin production as part of a paraneoplastic syndrome.

The word is from leio- + myo- + -oma, "smooth-muscle tumor".