Cases of breast cancer in people under 40, which tend to be more aggressive and difficult to treat, appear to be increasing slightly in the U.S.
| |  | | Breast Cancer in People Under 40 | Cases of breast cancer in people under 40, which tend to be more aggressive and difficult to treat, appear to be increasing slightly in the U.S. | | | | | | | | | | | Navigating Breast Cancer |  | Want more support navigating a breast cancer diagnosis? Visit our guide for help improving your quality of life, understanding your outlook, and knowing what to expect in the coming months and years. | | | | | | | | | Powered by community, empowered by each other | Chat with others and read breast cancer articles and member stories selected for you. | | | | | | | | | | | |