What is uterine leiomyoma cause?

Often nothing: Uterine leiomyomas (aka fibroids) are the most common pelvic tumor in women. They are often found incidentally and cause no symptoms. We call these fibroids "passengers" because they ride in the uterus and do not need any treatment. Women that have symptoms often complain of heavy menstrual flow, pelvic pain, or increased urinary frequency.