This document provides information about breast cancer including its causes, stages, risk factors, and statistics. Breast cancer is a malignant tumor that can affect both women and men. It has four main stages - stage 1 involves a small tumor and clear lymph nodes, while stage 4 means the cancer has metastasized. Risk factors include family history, age of first period/baby, and obesity. In 2011, there were over 2.6 million breast cancer survivors in the US, and 85% of cases occur in women with no family history.
![Semester 1 standars ,[object Object]](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)