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[11] [14] It is also used in hormonal birth control for women, in feminizing hormone therapy for transgender women and some non-binary individuals, and in the treatment of hormone-sensitive cancers like prostate cancer in men and breast cancer in women, among other uses.
If a patient with ER+ breast cancer develops endocrine resistance, the endocrine therapy used to treat the cancer will no longer be effective. Approximately 30-50% of ER+ breast cancer patients will relapse as a result of endocrine resistance, proving it to be a predominant challenge in the treatment of ER+ breast cancer patients. [19]
It was previously used in the treatment of breast cancer, but has been replaced by more effective and less toxic agents. Estrace is an estrogen which was also formerly used for antiandrogen therapy of prostate cancer. [2] Polyestradiol phosphate is a long-acting derivative of estradiol that is applied as an intramuscular injection.
Estrogen deprivation therapy, also known as endocrine therapy, is a form of hormone therapy that is used in the treatment of breast cancer.Modalities include antiestrogens or estrogen blockers such as selective estrogen receptor modulators (SERMs) like tamoxifen, selective estrogen receptor degraders like fulvestrant, and aromatase inhibitors like anastrozole and ovariectomy.
[1] [47] HDE was the first medical therapy for prostate cancer and breast cancer. [48] Pseudopregnancy was developed in the 1950s following the introduction of progestins with improved potency and pharmacokinetics , at which time it was used to treat hypoplasia of the uterus and breasts and endometriosis.
Staging breast cancer is the initial step to help physicians determine the most appropriate course of treatment. As of 2016, guidelines incorporated biologic factors, such as tumor grade, cellular proliferation rate, estrogen and progesterone receptor expression, human epidermal growth factor 2 (HER2) expression, and gene expression profiling into the staging system.
The use of high-dose estrogen therapy in breast cancer has mostly been superseded by antiestrogen therapy due to the improved safety profile of the latter. [17] High-dose estrogen therapy was the standard of care for the palliative treatment of breast cancer in women up to the late 1970s or early 1980s. [18
Side effects of estradiol enantate include breast tenderness, breast enlargement, nausea, headache, and fluid retention. [16] Estradiol enantate is an estrogen and hence is an agonist of the estrogen receptor, the biological target of estrogens like estradiol. [6] [5] It is an estrogen ester and a long-lasting prodrug of estradiol in the body.