Approx 2 yrs. ago, I had non-invasive ductal cell carcinoma in situ. I under went lumpectomy and radiation. I was placed on tamoxifen, which I have taken for 2 yrs. However, 11 years ago, I underwent a complete hysterectomy and had been on HRT which I immediately discontinued at the time of diagnosis of breast cancer. My question is , if I am incapable of producing ovarian estrogen and I do not take any form of HRT is it necessary to continue to take tamoxifen? Have there been studies of women who had estrogen positive breast cancer while on HRT due to hysterectomy and stopped their source of estrogen. The only information that I can find talks the women who had ovaries, and I have not found any information that talks about the women who have had hysterectomies prior to breast cancer.
Two years into five year tamoxifen stretch and I am very uncomfortable with night sweats, hot flashes, and mood swings, I understand there are antidepressants that help side effects but am really considering stopping the tamoxifen altogether because I have no estrogen to fight off.