Breast Mammogram and Tissue Study Women whose mammograms show a
lot of dense areas are more likely to develop breast cancer and
to have cancers that are missed by mammograms. It is unclear why
some factors lead to having dense breasts and why having dense
breasts increases the risk of developing breast cancer. To
determine why some women's breasts look dense on mammograms. To
determine what types of cells and tissues make up dense areas of
breasts and why these tissues may be more likely to become
cancerous. Women between 40 and 65 years of age who have not had
breast cancer or received medicines or radiation for any type of
cancer and who are scheduled to undergo a breast biopsy. This
study is conducted at the University of Vermont, in
collaboration with the NCI. Participants undergo the following:
- Review of their medical records collected over the last 2
years by the Vermont Mammography Registry. - Participation in a
short telephone interview. - Height and weight measurement. -
Testing of biopsy tissue co