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| MRI typing from architectural and dynamic features: a retrospective study in the differential diagnosis of breast lesions |
| LI Wei-min1, LIU Li2, ZHAO Rui-feng1, YI Xiao-chen1 |
| 1. Department of Imaging, the Second Affiliated Hospital of Mudanjiang Medical University, Mudanjiang Heilongjiang 157003, China; 2. Department of Imaging, Hongqi Hospital of Mudanjiang Medical University, Mudanjiang Heilongjiang 157011, China |
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Abstract Objective: To retrospectively evaluate the diagnostic ability of MRI typing from architectural and dynamic features in the differential diagnosis of breast lesions. Methods: 46 patients with breast lesions(54 lesions) underwent MRI before biopsy or operation. MRI findings were scored and rated into five types from both architectural features(enhancement diameter, shape and quantity of masses; enhancement distribution; border and surrounding structures) and dynamic features(enhancement pattern and time-signal intensity curve). Pathology results were taken as gold standard to evaluate MR imaging types. Results: Pathology revealed 22 benign masses(21 of type 3 and 1 of type 4), 14 malignant masses(10 of type 4 and 4 of type 5), 10 benign lesion without mass(9 of type 4 and 1 of type 5) and 8 malignant lesion without mass(5 of type 4 and 3 of type 5). When type 4 and 5 were considered malignant, MRI showed a sensitivity of 100% and a specificity of 93.8%(30/32). Only type 5 taken as malignant, the specificity was 100% but with a sensitivity of 31.8%(7/22). Conclusion: In the differential diagnosis of breast lesions in benign and malignant qualities, MR imaging types from architectural and dynamic features are of good diagnostic value and types 4 plus 5 as malignancies are of high diagnostic efficacy.
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Received: 31 March 2014
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2014, Vol. 25 
