Breast cancer is cancer originating from breast tissue, commonly from the inner lining of milk ducts or the lobules where the milk is produced. Breast cancers originating from the ducts are known as ductal carcinomas and those originating from the lobules are known as lobular carcinomas. Breast cancer most commonly occurs in women but men can also develop breast cancer.
Many tumour characteristics are evaluated before a treatment plan is proposed. These include tumour size, location, spread, receptor status, biological characteristics and many more. Treatment may include surgery, hormonal therapy, chemotherapy, radiation and immunotherapy. Surgical removal provides the largest benefit and in certain circumstances may be all that is needed to cure the patient. In other patients further therapy is necessary to improve the likelihood of long-term disease-free survival.