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Purpose: to study the possibilities of contrast enhanced dual-energy spectral mammography (CESM) in the diagnostics of malignant tumors in the breast.Material and methods. Forty-seven patients with suspicious for breast cancer (BC) lesions underwent CESM. Digital mammography (MMG) and post-contrast images were correlated with the results of path morphological studies after surgery or puncture biopsy was performed.Results. Sensitivity, specificity and overall accuracy in the diagnostics of breast cancer were 83.3%, 85.7%, 85.1% for digital mammography and 91.6%, 91.4%, 91.4% for CESM, respectively. The positive predictive value was 66.6% for digital MMG and 78.5% for CESM. The negative predictive value (NPV) was 96.9% for the CESM and exceeded NPV of the digital MMG, which was 93.7%.Conclusion. Thus, these findings suggest that CESM is an effective method for the diagnostics of malignant tumors in the breast.

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The efficacy of SPECT-CT with 99mTc-MIBI for detecting axillary lymph node (LN) involvement was evaluated in 184 patients with primary breast cancer. All patients were operated with histological examination of axillary LNs. During statistical analysis we determined correlation between LN metastases and various diagnostic and clinical characteristics. SPECT-CT signs of LN involvement were as follows: short axis more than 10 mm, cortical thickness more than 4mm, solid structure, round shape, intensive tracer uptake. More than 2 metastatic LNs were considered as plural metastatic damage. The complex model for evaluation axillary LN involvement was elaborated. The use this data in our study showed that SPECT-CT 99mTc-MIBI could correctly exclude 2 or more metastatic LNs in 96% breast cancer patients.

Breast cancer (BC) in young women is cancer that has developed in women aged less than 40 years. Purpose of this study was to compare the overall diagnostic performance of CESM and digital mammography (DM) in detecting breast cancer in women under 40 years. The study group included 75 patients.When analyzing the data obtained, all indicators of diagnostic effectiveness in CESM statistically significantly exceeded the DM data.Thus, due to the ability to assess vascularization, CESM is characterized by higher sensitivity in the diagnosis of breast cancer in young women comparing to DM.