Ironically, estrogen therapy is often prescribed to relieve menopausal symptoms in non-breast cancer patients. For example, local estrogen therapy (LET) is often used to treat vaginal atrophy (dry vagina). While Dr. Ratner acknowledges that LET has a very low systemic absorption, she said many oncologists discourage its use in breast cancer patients. She further recommends vaginal moisturizers as a viable option for these women. She noted that even testosterone can convert to estrogen in the body, so this is not an option for women with breast cancer.
via Beyond Treating Breast Cancer: Treating the Menopausal Symptoms That Ensue | ThirdAge.