Complex radiology diagnostics of non-palpated breast lesions in premenopausal period

Non-palpable breast lesions occur in 60-75[%] of women in premenopausal period. The risk of cancer in this age group is high, while 2/3 of lesions are benign. The difficulties of diagnostics are presented with diversity and similarity of radiologi-cal manifestations. US-negativity complicates the categorization of preclinical breast lesions in one third of cases, thereby increasing the number of unjustified biopsies. Purpose. To determine the cause of US-negativity in preclinical breast lesions, the predictive value of important radiological criteria for the correct assessment of changes and indirect signs of lesions of the breast classification system BI-RADS; to develop a strategy in respect of the US-negative for the first time and newly identified non-palpable formations. Materials and methods. The study included 423 patients in premenopausal age with non-palpable formations of the mammary glands, 132 of which were not visualized with ultrasound. Breast cancer identified in 129 cases