DIAGNOSIS OF EARLY FORMS OF BREAST CANCER
Breast cancer (BC) is an urgent problem in medicine. This is due to the fact that breast cancer occupies the first place in the structure of cancer incidence among women. Mortality rates also occupy a leading position. Moreover, this trend is observed almost all over the world. High rates of death from breast cancer are due to insufficient level of health care development, biological features of the tumor, low frequency of early forms, late treatment of patients, and some others. The article examines the clinical and diagnostic features of early forms of breast cancer in two centers - the Moscow research Institute of Oncology named after Herzen (MROI) (Moscow, Russia) and the National center of Oncology and Hematology (NCOG) (Bishkek, Kyrgyzstan). This retrospective cohort study involved 108 patients from MROI and 110 patients from NCOG with early forms of breast cancer (T0, T1-2a). All patients were diagnosed with a malignant breast tumor morphologically or histologically verified. Breast cancer patients met all the criteria for inclusion/exclusion. The average age of patients in the MROI and NCOG was approximately the same - 52.3 ± 8.1 years and 55.6 ± 8.25 years, respectively. A comparative study of the data of ultrasound and mammography methods in two centers was conducted. In situ carcinoma was significantly more frequently diagnosed in the MROI than in the NCOG. The sensitivity of ultrasound and mammography was approximately the same in the two centers and ranged from 60 % to 80 %.