12 doctors weighed in:

Does HRT cause cancer ?

12 doctors weighed in
Dr. Dennis Higginbotham
Obstetrics & Gynecology
9 doctors agree

In brief: Depends on the type

It is well known that unopposed estrogen therapy can cause endometrial cancer.
While some literature suggests that there is a relationship between "hrt" (ie: estrogen/progesterone) and breast cancer, there are no definitive studies confirming a cause and effect relationship. Yet, is is also known that some, but not all, breast cancers will grow faster when stimulated by estrogen.

In brief: Depends on the type

It is well known that unopposed estrogen therapy can cause endometrial cancer.
While some literature suggests that there is a relationship between "hrt" (ie: estrogen/progesterone) and breast cancer, there are no definitive studies confirming a cause and effect relationship. Yet, is is also known that some, but not all, breast cancers will grow faster when stimulated by estrogen.
Dr. Dennis Higginbotham
Dr. Dennis Higginbotham
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Dr. Richard Orr
Surgery - Oncology
3 doctors agree

In brief: Increases risk

Although it is hard to prove that ert "causes" breast cancer, there are many suggestive studies that show that women who take ert for a prolonged period of time have an increased risk of developing breast cancer. Most post-menopausal breast cancers are estrogen receptive and a drug (tamoxifen) that blocks estrogen clearly decreases a woman's risk.

In brief: Increases risk

Although it is hard to prove that ert "causes" breast cancer, there are many suggestive studies that show that women who take ert for a prolonged period of time have an increased risk of developing breast cancer. Most post-menopausal breast cancers are estrogen receptive and a drug (tamoxifen) that blocks estrogen clearly decreases a woman's risk.
Dr. Richard Orr
Dr. Richard Orr
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Dr. Dennis Higginbotham
Board Certified, Obstetrics & Gynecology
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