This document discusses breast cancer, including its types, causes, diagnostic tests, and management. The main types are ductal carcinoma in situ, lobular carcinoma in situ, invasive ductal carcinoma, invasive lobular carcinoma, inflammatory breast cancer, and Paget's disease. Diagnostic tests include clinical breast examination, mammography, biopsy and other imaging tests. Management involves surgical procedures, radiation therapy, hormonal therapy, and targeted therapies to block molecules involved in tumor growth.