Effect of 4-Hydroxytamoxifen Gel on Breast Density, Salivary Sex Steroids, and Quality of Life in Premenopausal Women

RATIONALE: High estrogen levels may be associated with dense breast tissue and an increased risk of developing breast cancer. 4-hydroxytamoxifen gel (a substance made when tamoxifen breaks down in the body) may be effective in reducing breast density by reducing estrogen levels with fewer side effects than tamoxifen. This may improve quality of life and the ability to detect breast cancer with screening mammography. PURPOSE: Randomized screening study to determine the effect of 4-hydroxytamoxifen gel on breast density, salivary sex steroids (hormones), and quality of life in premenopausal women.