[MRI features of space-occupying lesions in the breast].

Our study evaluates the correlation between benign and malignant breast masses contrast enhancement, on the one hand, and the type of the vascular net and histological prognosis, on the other. We reviewed the preoperative images of 298 breast masses (benign--95 (32%), malignant--203 (68%)) after dynamic contrast enhancement as well as on the basis of pathomorphological data. Due to use of high-concentration paramagnetic contrast agents in ultra-fast sequences, benign and malignant tumors could be differentiated. The quantitative data on both intensive contrast and ring-shaped enhancement corresponded to the low capillary density in the center of carcinoma which correlated with poor prognosis.

[Comparison of the information value of traditional methods of visualization and MP-mammography before performing organ-saving operations for cancer of the breast].

The breast MRI with contrast enhancement, sonography and mammography were performed in 82 female patients (mean age 54 +/- 3 years) with breast malignancy. Mammography and USI detected correct size of tumor only in 57 out of 82 cases (69.5%), in 21 cases (25.6%) the size of the tumor were underestimated, in 4 cases (4.9%) overestimated. MRI showed precise size of tumors in 91% of cases with underestimation in 5% and overestimation in 4% of cases. Breast MRI gives more accurate estimation of the tumor extent compared with US and mammography (91.4% versus 69.5%). Both MRI and conventional diagnostic tools showed precise size of the tumor in 68% of the patients. Thus, MRI gives more accurate estimation of the tumor extent than US and mammography, which is of particular importance in the preoperative evaluation when breast-conserving surgery is planned with the main purpose to reach the optimal balance between radical treatment and cosmetic effect.