Diane, looks to me like the risk of uterine cancer  for post-menopausal women on tamoxifen is just shy of 4X what it would be if you weren't taking tamoxifen: it's 1.5%, as opposed to .4%. So either way, very, very low. Not sure what it is for pre-menopausal women, but still, I'd assume low. If I were you I'd get a second opinion; a hysterectomy or ooperectomy are serious, and come with their own side effects (bone density loss, and other issues associated with loss of estrogen). If it were me, I'd risk the 1.5% in return for no more surgery and keeping my ovaries/uterus. Unless there's some other factor here that's encouraging those operations? I suggest getting more info., and/or a second opinion. Good luck - PJH