Important contributions about the treatment modalities of breast cancer are presented in this book. The risks and limitations of breast conserving therapy of mammary carcinoma are dealt with. Newest findings show that this form of therapy has the same outcome as conservative treatment modalities. The book also considers controversial issues such as the treatment of mastopathy, precancerous, and non-invasive lesions of the breast. New, but not yet approved, regimes for the prevention of mammary carcinoma and open questions concerning adequate operative treatment are discussed. Latest results presented here show that all modern palliative chemotherapy has a certain but limited effect on outcome and that early detection and preventive therapy (surgical and hormonal) will be of great importance for improved chances of survival of breast cancer.