ROLE OF CONTRAST MR MAMMOGRAPHY IN THE INDETERMINATED BREAST DISEASES
Abstract
The purpose of this study is to evaluate the diagnostic capability of contrast MR mammography (MRM) in the problem of breast lesions that were indeterminated on mammography and ultrasonography.
The contrast MRM of twenty - two proven breast lesions was retrospectively reviewed. All lesions were indeterminated on mammography and sonography. There were eight cases received conserving breast treatment for carcinoma. The contrast MRM was performed by GE Signa 1.5 Tesla system. Only nine cases had post contrast dynamic study with signal time curve. All lesions were read and concensus by two radiologists using the same criteria based on MR morphologic features, patterns of enhancement and signal time curve. The qualitative and quantitative studies were integrated into the five points confidence scale (MRI score). The lesions were graded benign or malignant according to the MRI score (1,2 = benign and 3,4,5 = malignant). Furthermore, we analyzed the data of these lesions into two groups, group 1 without signal time curve and group 2 with signal time curve.
Twenty - two lesions were interpreted by using the MRI score, seven lesions were considered to be malignant and fifteen lesions were considered to be benign. The sensitivity, specificity, and accuracy in the diagnosis of breast disease were 75%, 92.8%, and 86.4% respectively. In comparison between the group | and group 2, the sensitivity, specificity, and accuracy in diagnosis were 60.0%, 80.0%, 70.0% in group 1 and 100%, 100%, 100% in group 2, respectively.
Contrast MRM is the effective imaging method for evaluation of the breast lesions that mammography and sonography were indeter-minated. Supplement dynamic study with signal time curve should improve the capability and provide superiority in establishing the correct diagnosis.
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