Description. Uterine myomas (also: uterine leiomyomas, uterine fibroids) are an accumulation of numerous benign, nodular growths or tumors, consisting of muscle and connective tissue, that may form in or on the uterus.

Uterine fibroids are noncancerous growths of the uterus that often appear during childbearing years. Also called leiomyomas (lie-o-my-O-muhs) or myomas, uterine fibroids aren't associated with an increased risk of uterine cancer and almost never develop into cancer.