Related Experiment Video
Updated: Jun 26, 2026
09:36
Changes in Mammary Gland Morphology and Breast Cancer Risk in Rats
Published on: October 16, 2010
Mammographic density: a heritable risk factor for breast cancer
Norman F Boyd1, Lisa J Martin, Johanna M Rommens
1The Campbell Family Institute for Breast Cancer Research, Ontario Cancer Institute, Toronto, Canada.
Methods in Molecular Biology (Clifton, N.J.)
|December 25, 2008
Summary
High mammographic density significantly increases breast cancer risk. Inherited genetic factors explain most of this density, offering potential targets for breast cancer prevention strategies.
Area of Science:
- Radiology
- Oncology
- Genetics
Background:
- Mammographic density, representing breast tissue composition, varies among women.
- Dense breast tissue appears light on mammograms, while fatty tissue appears dark.
Purpose of the Study:
- To investigate the association between mammographic density and breast cancer risk.
- To explore the heritability and influencing factors of mammographic density.
- To identify potential genetic targets for breast cancer prevention.
Main Methods:
- Analysis of mammographic images to quantify breast density.
- Statistical analysis to assess the relationship between density and breast cancer risk.
- Twin studies to determine the heritability of mammographic density.
Main Results:
- Mammographic density is a strong risk factor for breast cancer, with risk increasing significantly with higher density.
- Factors like age, parity, BMI, and menopause influence density but explain limited variation.
- Inherited genetic factors account for 63% of the variance in mammographic density.
Conclusions:
- Mammographic density is a significant predictor of breast cancer risk.
- Genetic factors play a major role in determining mammographic density.
- Identifying genes influencing density may reveal insights into breast cancer biology and prevention.
