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Effect was especially strong for estrogen-sensitive tumor types, study found.
Alcohol, consumed even in small amounts, increases the risk of breast cancer and particularly estrogen-receptor and progesterone-receptor positive breast cancer, a new study shows.
The findings, expected to be presented Sunday at the annual meeting of the American Association for Cancer Research, in San Diego, are followed by a second study that found an association between breast cancer risk and two genes involved in alcohol metabolism.
Previous data has suggested that consuming alcohol ups the risk of breast cancer, although the precise mechanisms have not been clarified.
In some forms of breast cancer, malignant cells have receptors that render them sensitive to hormones such as estrogen. The first study aimed to see if the hormone receptor status of the tumor influenced the relationship between alcohol consumption and breast cancer risk.
In the study, a team led by Dr. Jasmine Lew of the U.S. National Cancer Institute followed more than 184,000 postmenopausal women for an average of seven years.
ABC News: Drinking May Raise Breast Cancer Risk
Alcohol, consumed even in small amounts, increases the risk of breast cancer and particularly estrogen-receptor and progesterone-receptor positive breast cancer, a new study shows.
The findings, expected to be presented Sunday at the annual meeting of the American Association for Cancer Research, in San Diego, are followed by a second study that found an association between breast cancer risk and two genes involved in alcohol metabolism.
Previous data has suggested that consuming alcohol ups the risk of breast cancer, although the precise mechanisms have not been clarified.
In some forms of breast cancer, malignant cells have receptors that render them sensitive to hormones such as estrogen. The first study aimed to see if the hormone receptor status of the tumor influenced the relationship between alcohol consumption and breast cancer risk.
In the study, a team led by Dr. Jasmine Lew of the U.S. National Cancer Institute followed more than 184,000 postmenopausal women for an average of seven years.
ABC News: Drinking May Raise Breast Cancer Risk