This document discusses breast cancer, including its definition, types, stages, symptoms, and treatments. It begins by defining breast cancer as a malignant tumor that starts in breast cells. There are several types of breast cancer such as ductal carcinoma in situ, invasive ductal carcinoma, inflammatory breast cancer, and metastatic breast cancer. Treatment options discussed include surgery to remove tumors, chemotherapy using drug combinations, radiotherapy using radiation, and hormonal therapy for cancers affected by hormones. The document provides an overview of breast cancer, its classification and common therapeutic approaches.