MRI for Surgical Planning in Patients with Breast Cancer Who Undergo Preoperative Chemotherapy

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Abstract
OBJECTIVE. Accurate presurgical evaluation of residual disease appears essential for successful clinical outcome in patients with breast cancer who are undergoing chemotherapy. Our objective was to study the impact on surgical planning of adding serial MRI evaluations of the tumor to standard non–MRI assessments.MATERIALS AND METHODS. MR images of breast tumors obtained before, during, and after preoperative chemotherapy were reviewed in 30 patients. Tumor response was assessed using both size and morphologic MRI criteria. We compared the actual surgical decisions made prospectively on the basis of standard (clinical, mammographic, and sonographic) assessments of response with decisions that would have been made had MRI findings also been considered. MRI investigators were blinded to the ultimate surgical results. Successful breast-conserving surgery was judged on pathologic confirmation of excision margins that were negative for cancer.RESULTS. The standard evaluation led to 16 successful breast-conservi...

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