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Breast Cancers Detected with Imaging Screening in the BRCA Population: Emphasis on MR Imaging with Histopathologic Correlation¹

¹ From the Department of Medical Imaging (P.A.C., R.A.J., B.N.C.), Division of Medical Oncology, Department of Medicine (E.W., K.H.), Department of Anatomic Pathology (J.W.W.), and Imaging Research and Department of Medical Biophysics (D.B.P.), Sunnybrook Health Sciences Centre, University of Toronto, 2075 Bayview Ave, MG166, Toronto, ON, Canada M4N 3M5. Presented as an education exhibit at the 2006 RSNA Annual Meeting. Received February 5, 2007; revision requested March 20 and received May 24; accepted June 21. Supported by the Canadian Breast Cancer Research Initiative, the Terry Fox Foundation of the National Cancer Institute of Canada, the Ontario Research and Development Challenge Fund, and Amersham Health, Oakville, Ontario, Canada. R.A.J. collaborates on research with General Electric, Fairfield, Conn; all other authors have no financial relationships to disclose. Address correspondence to P.A.C. (e-mail: Petrina.causer{at}sunnybrook.ca).

The benefit of screening with breast magnetic resonance (MR) imaging for certain patient populations at high risk for breast cancer, most notably patients with a genetic mutation in the BRCA1 or BRCA2 gene, has been established in numerous studies and is now becoming part of routine clinical practice. Despite the lower sensitivity of mammography compared with that of MR imaging, the former remains the standard of care for screening any patient population. In the BRCA1 and BRCA2 populations, the inferior sensitivity and specificity of ultrasonography (US) limit its role as a screening tool, but US remains a vital diagnostic tool because of its ability to provide guidance for biopsy of many suspicious lesions detected with MR imaging. Important features of a screening program with breast MR imaging include the following: optimization of the MR imaging technique, an awareness of the imaging features of invasive and noninvasive breast cancers detected with MR imaging, an understanding of the limitations of the various imaging modalities in both the initial screening and subsequent diagnostic work-up evaluations, and the requirement for MR imaging–guided biopsy.

© RSNA, 2007