Diagnostic accuracy of high-resolution MRI using a microscopy coil for patients with presumed DCIS following mammography screening.
OBJECTIVE
To prospectively evaluate the accuracy of high-resolution (HR)-MRI as a secondary examination in women with abnormal calcifications detected on mammography.


METHODS
We used a 4.7-cm microscopy coil to acquire HR-MRI signal data. We examined 52 women with breast lesions preoperatively using HR-MRI and vacuum-assisted core needle biopsy. The lesions were suspicious of malignancy, classified as category 3-5 on mammography (Breast Imaging Reporting and Data System [BI-RADS]), and without a palpable mass. All visualized suspicious lesions were correlated with histological findings. We compared the HR-MRI and pathological findings and calculated the sensitivity, specificity, and accuracy.


RESULTS
We compared the breast HR-MRI results with the gold standard of pathological results for studies of malignancy (DCIS and invasive cancer), and found a sensitivity of 88.5%, specificity of 92.3%, and accuracy of 90.4%. The positive predictive value (PPV) was 92%, and the negative predictive value (NPV) was 88.9%. When breast MRI was compared with pathological results for studies that diagnosed DCIS only, the results revealed a sensitivity of 88.6%, specificity of 88.2%, accuracy of 88.5%, PPV of 93.9%, and NPV of 78.9%.


CONCLUSIONS
HR-MRI using a microscopy coil is a useful, reliable, safe, and minimally invasive procedure that is a good choice for secondary assessment of abnormal calcification in the breast.
Zhu
Jingzhi
J
Department of Radiology, St. Marianna University School of Medicine, Sugao, Kawasaki City Kanagawa, Japan.
Kurihara
Yasuyuki
Y
Kanemaki
Yoshihide
Y
Ogata
Haruki
H
Fukuda
Mamoru
M
Nakajima
Yasuo
Y
Maeda
Ichiro
I
D000328:Adult; D000368:Aged; D001707:Biopsy, Needle; D001943:Breast Neoplasms / Q000175:diagnosis* / Q000000981:diagnostic imaging / Q000473:pathology; D002285:Carcinoma, Intraductal, Noninfiltrating / Q000175:diagnosis* / Q000000981:diagnostic imaging / Q000473:pathology; D003287:Contrast Media; D003937:Diagnosis, Differential; D005260:Female; D019786:Gadolinium DTPA; D006801:Humans; D008279:Magnetic Resonance Imaging / Q000295:instrumentation*; D008327:Mammography; D008875:Middle Aged; D011237:Predictive Value of Tests; D011446:Prospective Studies; D012680:Sensitivity and Specificity
D003287:Contrast Media; C064925:gadodiamide; D019786:Gadolinium DTPA