Can supplementary contrast-enhanced MRI of the breast avoid needle biopsies in suspicious microcalcifications seen on mammography? A systematic review and meta-analysis
Barbara J. Fueger, Paola Clauser, Panagiotis Kapetas, Nina Pötsch, Thomas H. Helbich, Pascal Baltzer
Abstract
PURPOSE: To analyze the rate of potentially avoidable needle biopsies in mammographically suspicious calcifications if supplementary Contrast-Enhanced MRI (CE-MRI) is negative. METHODS: -statistics, Deek's funnel plot testing and meta-regression were employed. P-values <0.05 were considered significant. RESULTS: Thirteen studies investigating 1414 lesions with a cancer prevalence of 43.6% (range: 22.7-66.9%) were included. No publication bias was found (P = 0.91). CE-MRI performed better in pure microcalcification studies compared to those also including associate findings (P < 0.001). In the first group, the pooled rate of avoidable biopsies was 80.6% (95%-CI: 64.6-90.5%) while the overall and invasive cancer FN rates were 3.7% (95%-CI: 1.2-6.2%) and 1.6% (95%-CI 0-3.6%), respectively. Up to a pre-test probability of 22%, the post-test probability did not exceed 2%. CONCLUSION: A negative supplementary CE-MRI could potentially avoid 80.6% of unnecessary stereotactic biopsies in BI-RADS 4 microcalcifications at a cost of 3.7% missed breast cancers, 1.6% invasive. BI-RADS benchmarks for downgrading mammographic calcifications would be met up to a pretest probability of 22%.