Hormone-replacement therapy
Hormone-replacement therapy (HRT) does not
appear to increase significantly the risk of developing breast cancer unless
taken for prolonged periods (over 10 years), and perhaps in certain high-risk
groups. HRT may, however, prolong symptoms of benign breast disorder and make
mammographic appearances more difficult to interpret.
Patients
who develop breast cancer whilst on HRT appear to have a more favourable
prognosis. The consequences in terms of recurrence in women using HRT following
breast cancer are unknown.