[Diagnosis and treatment for Paget's breast cancer: state of the art].

Breast cancer is the most common cancer in women. According to WHO experts in the world each year there are revealed from 800,000 up to 1 million new cases of breast cancer. In the structure of malignant tumors morbidity among female population, in Russia in 2012 breast cancer ranked the first place (20.7%) and remained the leading malignant pathology in women. Paget's breast cancer is a rare form of breast cancer that occurs in the mouth of the excretory ducts of the nipple, which characterized by lesion of the nipple and large ducts, often with the formation of tumor in the breast. This rare abnormality occurs in 0.5-5% of all cases of breast cancer.