triple negative breast cancer (IMAGE) Johns Hopkins Medicine Caption African American women have higher rates of triple negative breast cancer. Study shows the molecular mechanisms that may be a cause. Credit Dipali Sharma, Ph.D. Usage Restrictions None License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.