Type 2 diabetes, metformin use impact risk for breast cancer subtypes – Healio

Women with type 2 diabetes and those who used metformin did not demonstrate an overall increased risk for breast cancer, according to an analysis of the Sister Study published in Annals of Oncology.
However, type 2 diabetes appeared associated with an increased risk for triple-negative breast cancer. Also, use of metformin for type 2 diabetes appeared associated with increased risk for ER-negative breast cancer and triple-negative breast cancer, but decreased risk for ER-positive breast cancer,…

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