The 5-year survival rates for women with breast cancer are steadily increasing. The number of cases of mastectomy for breast cancer is not reduced annually. In this regard, the analysis of epidemiological data on the observations of breast cancer in women in Russia seems to be an urgent activity in terms of predicting measures to optimize the volume of the recovery component of providing medical care to patients who have undergone mastectomy. It was established that in2017 in St. Petersburg the incidence rate of breast cancer reached 60,1100/. The parameter of the prevalence of malignant0000neoplasms of the mammary glands for the analyzed period exceeds the similar all-Russian by 19,3%. The frequency of casesof active detection of breast cancer in 2011-2018. increased 7,2 times. In the same period, the number of working-age urbanwomen diagnosed with breast cancer increased by 16,6%. The proportion of cases of verification of breast cancer of the I - IIstage of the tumor process in 2011-2018 increased by 1,2 times, reaching 72,2% in 2018. From 2011 to 2018, the growth of5-year survival of patients with breast cancer in St. Petersburg reached 4,9%, amounting to 63,4 in 2018% The parameterof annual mortality in breast cancer in 2011-2018 decreased by 30,6%. The performance indicators of the St. PetersburgOncology Service for the treatment of patients with breast cancer are comparable with similar parameters in Moscow clinicsand medical organizations in Russia as a whole. The increase in potential needs for prosthetics of the mammary glands dueto the increase in the number of patients with cancer who underwent mastectomy, in the future will necessitate the expansionof the high-tech types of medical care provided to patients suffering from malignant neoplasms of the mammary glands.