Breast cancer is a disorder which occurs in the mammary gland, an organ on the body surface. Therefore, we traced the clinical course peculiar to breast cancer that is considerably different from lung and digestive cancer of a visceral origin. In addition, the standard treatment established worldwide for mammary cancer on the basis of cumulative of European and American evidence is in the surgery, internal medicine and radiologic fields. It is important that the is treated in an outpatient department setting and supported by home care. The construction of a team approach in medical care is an urgent issue for successful home care.