Estrogen replacement therapy following oophorectomy in women with a family history of ovarian cancer.

Compliance with estrogen replacement therapy (ERT) following surgical menopause is poor. In women who have a family history of ovarian cancer, fear of the oncogenic potential of estrogen might affect compliance with ERT following oophorectomy. Compliance with ERT in such a select group of women has not been previously reported. The aim of the present study was to report on compliance with and side effects of ERT in women with a family history of ovarian cancer who underwent oophorectomy either prophylactically or for benign disease. Eighty women with a family history of ovarian cancer who underwent oophorectomy at Roswell Park Cancer Institute were followed for a median duration of 4.2 years (range, 5 months to 14 years). Of the 76 women who were given prescriptions for ERT, the rates of commencement and maintenance of ERT at 1, 2, and 5 years were calculated. Side effects related to the different modalities of ERT were recorded. Seventy-one of 76 women (93.4%) who were given prescriptions for ERT initiated treatment. The rate of commencement of ERT was higher in premenopausal than in postmenopausal women (98.3% versus 75%, respectively, P = 0.003). Except for one patient who developed breast cancer after the oophorectomy and was advised to stop estrogen, all patients said they continued to use ERT. The maintenance rates at 1, 2, and 5 years were 100% as per patients' history. The pharmacy records for ERT prescription refills were reviewed for 52 patients who were on ERT for more than 1 year. ERT compliance was confirmed in 42 patients (80.7%). Seven of 30 patients (23.3%) who retained their uterus developed irregular uterine bleeding and 4 underwent endometrial biopsies. The incidence of irregular uterine bleeding was significantly higher after continuous compared to cyclic estrogen and progestogen (37.6 and 7% respectively, P = 0.049). Four patients (5.6%) complained of hot flashes and were managed by changing the dose or formula of estrogen. Compliance with ERT among patients with a family history of ovarian cancer who underwent oophorectomy either prophylactically or for benign disease was excellent. The presence of the uterus and the incidence of irregular uterine bleeding did not affect patients' compliance with ERT.