Ethnic differences in mammographic densities

Breast cancer incidence is considerably lower among Japanese and Chinese women than among Caucasian and Native Hawaiian even in second and third generation migrants. Mammographic densities, which refer to the radiological appearance of the healthy female breast, are related to breast cancer risk. The purpose of this project was to explore the hypothesis that women from ethnic groups at high breast cancer risk are more likely to have high levels of densities than women from low breast cancer risk groups.