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  • Title: Does magnetic resonance imaging accurately predict residual disease in breast cancer?
    Author: Stucky CC, McLaughlin SA, Dueck AC, Gray RJ, Giurescu ME, Carpenter SG, Grimsby GM, Apsey HA, Pockaj BA.
    Journal: Am J Surg; 2009 Oct; 198(4):547-52. PubMed ID: 19800466.
    Abstract:
    BACKGROUND: The accuracy of magnetic resonance imaging (MRI) in identifying residual disease after breast conservation therapy (BCT) is unclear. METHOD: Review of an institutional database identified patients with positive or close (<or=2 mm) margins undergoing MRI before re-excision. Histopathologic correlation was performed. RESULTS: Forty-three women underwent MRI after BCT. MRI suggested residual disease in 29 patients, of whom 20 (69%) had residual carcinoma pathologically. Nine patients had false-positive MRI as seen by benign pathology findings. Fourteen MRIs indicated no residual disease, of which 6 had residual disease pathologically. The sensitivity and positive predictive value of MRI was 77% and 69%, respectively. MRI conducted within 28 days of the original surgery was 85% sensitive. MRI performed after 28 days was 69% sensitive. CONCLUSIONS: MRI is able to detect residual disease among most patients undergoing re-excision. False-positive results may be caused by inflammatory processes that resemble residual disease.
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