Analysis of MRI imaging features of non-mass lesions shown by breast mammography

Abstract

Objective To analyze the MRI imaging features of non-mass lesions shown by mammographic, and to judge the benign and malignant of the lesions and discuss the value of MRI in the diagnosis of non-mass lesions of the breast. Methods Fifty-eight patients who were diagnosed as non-mass lesions by mammographic and underwent breast MRI examination before operation were enrolled. The lesion morphology, diffusion weighted and enhancement features, time curve and other in MRI were observed and analyzed. Results Among the 58 cases of mammography with non-mass lesions, 13 cases were BI-RADS category 4 and 5, and 7 cases were confirmed by pathology. All of the 7 cases were accompanied with signs, such as calcification (clustered calcification, segmental calcification), partial structural distortion, thickening of adjacent skin and nipple invasion, and 3 cases in 6 cases of simple non-mass lesions were benign lesions. In 25 cases of class BI-RADS category 2 and 3, 10 cases were malignant lesion by pathology; 20 cases of BI-RADS 0 need further imaging examination; the coincidence rate was 43.10%. Fifty-eight cases of MRI results showed that, 31 cases were BI-RADS category 4 and 5, and 6 cases of them were benign lesion by pathology; 27 cases were BI-RADS category 2 and 3, and 3 cases of them were malignant lesion by pathology; the pathological coincidence rate of MRI was 84.95%. Conclusions Mammography is a non mass lesion. Mammography MRI is of great significance in judging the benign and malignant lesions by analyzing the lesion shape, diffusion-weighted and dynamic enhancement and time signal intensity. Key words: Breast mammography; Non-mass lesion; Benign; Malignant; Magnetic resonance imaging