An unusual condition characterized by the presence of numerous small benign smooth muscle neoplasms located throughout the body of the uterus. The disease is Monarch Disease Ontology term MONDO_0003704 (uterine corpus diffuse leiomyomatosis). Also known as: body of uterus leiomyomatosis, leiomyomatosis of body of uterus, uterine corpus leiomyomatosis.