Breast Cancer Basics What is Breast Cancer Share Pin Email More in Breast Cancer Basics Nipple and Areola Health Diagnosis Treatment Life During Treatment Life After Treatment Newly Diagnosed Breast Pain Risk and Prevention Mammograms Benign Breast Conditions Types Cancer-Fighting Foods Side Effects Breast Reconstruction Glossary Support and Resources View All Updated April 20, 2016 Breast cancer is cancer around the tissue of the breast. About 1 in 8 women will develop breast cancer in their lifetime. Watch our video to learn more about the facts of breast cancer and how it harms the body. Up Next Up Next Article LCIS: Not Cancer but Increases Your Risk for a Future Invasive Cancer Up Next Article What Is Breast Cancer Stage Zero? Up Next Video How to Understanding Breast Cancer Tumor Sizes Up Next Article What Is Ductal Carcinoma In Situ?