My mom has had to deal with fibroids for as long as I can remember. She got hers removed (myomectomy) and then they grew back. I don't believe I've ever heard of them being cancerous and the only way to ensure they will not return is to get a hysterectomy. There's a lot of information online about natural remedies for this pretty common issue.
Thanks @MsAshleyRenee for your reply. Its good that fibroids are not cancerous because many women have to face this in their lifetime but I think for the safer side doctors do biopsy. But its sad that after myomechtomy it grew back.