06.04.1311:46 AM ET

Genetic Abnormalities Drive Breast Cancer

In black women, study says.

A study revealed that black women with breast cancer commonly have BRCA gene mutations, which raises the risk of breast cancer because of the lack of a tumor-suppressing gene. The study—the first of its kind for the racial group—explains why black women have higher risk of breast cancer and a worse survival rate. Many of the women, from Chicago-area hospitals, had breast cancer at a young age, and half had a history of the disease. According to the National Cancer Institute, more than 323,000 women are expected to be diagnosed with breast cancer in 2013, with about 5 percent to 10 percent of those due to bad BCRA genes.