Question: are all fibroid tumors benign?
Answer: Fibroids are muscular tumors that grow in the wall of the uterus (womb). Another medical term for fibroids is leiomyoma (leye-oh-meye-OH-muh) or just "myoma". Fibroids are almost always benign (not cancerous). Fibroids can grow as a single tumor, or there can be many of them in the uterus.