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[Gradually enhancing breast cancer on dynamic MRI]
I Isomoto1, T Koshiishi, T Okimoto
1Department of Radiology, Nagasaki University School of Medicine.
Purpose:
The aim of our study was to evaluate the frequency and the radiologic and pathologic features of gradually enhancing breast cancers on contrast enhanced dynamic MRI.
Material And Methods:
83 patients with pathologically proven breast cancer underwent contrast enhanced dynamic MRI. Breast cancers that showed a gradually enhancing pattern were selected, and their pathological features and the findings in other imaging modalities were retrospectively analyzed.
Results:
Of 83 lesions, 8 lesions (10%) showed a gradually enhancing pattern on dynamic MRI. The lesions included 3 papillotubular carcinomas, 3 scirrhous carcinomas, one solid-tubular carcinoma, and one mucinous carcinoma. All of them had imaging features suggesting malignancy on mammography and ultrasonography. Histopathologically, all 7 invasive ductal carcinomas showed prominent fibrosis in the stroma, and one showed many dilated ducts. One mucinous carcinoma showed large mucinous pools.
Conclusion:
Some breast cancers may show a gradually enhancing pattern on dynamic MRI. Other imaging features should be taken into account in the differential diagnosis of breast tumors.
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