Fibroids are a benign tumor of the uterus.
They are not cancers. However, they do have a rich blood supply, and cause bleeding and pain. In 1991, Interventional Radiologists began to treat fibroids by blocking the small arteries which supply them with blood. This stops the bleeding, and often also shrinks the tumor. This can help you avoid more invasive treatments such as myomectomy or hysterectomy.