Breast density change linked to cancer development in WHI hormone replacement study

An increase in breast density appears to be the culprit behind an increase of breast cancer found in women participating in the estrogen and progestin therapy study, a part of the Women's Health Initiative (WHI). That is the finding of a new WHI analysis led by Celia Byrne, PhD, assistant professor at Georgetown Lombardi Comprehensive Cancer Center, and presented during the AACR 101st Annual Meeting 2010 in Washington, DC.

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