Breast cancer forms in the cells of the breasts and can spread to other parts of the body. In 2022, an estimated 287,850 new cases of invasive breast cancer are expected to be diagnosed in women in the US. Risk factors include increasing age, obesity, family history, and radiation exposure. Early detection through breast cancer screening and mammograms can find cancer before symptoms appear. Maintaining a healthy lifestyle through diet, exercise, and limiting alcohol can help reduce the risk of breast cancer.