Effect of Mammography on Marker Clip Migration after Stereotactic-Guided Core Needle Breast Biopsy

Publication date: Available online 16 February 2017
Source:Current Problems in Diagnostic Radiology
Author(s): Huong T. Le-Petross, Kenneth R. Hess, John D. Knudtson, Deanna L. Lane, Tanya W. Moseley, William R. Geiser, Gary J. Whitman
ObjectiveTo determine whether the type of projection used—same as or orthogonal to the projection used during a stereotactic-guided core needle biopsy procedure—to obtain the first view on a two-view post-biopsy mammogram affects biopsy marker clip migration.Patients and MethodsWe prospectively recruited women scheduled to undergo stereotactic-guided core needle breast biopsy with marker clip deployment and divided the women randomly into 1 of 2 groups: first view on the post-biopsy mammogram obtained in the same projection as that used during the biopsy procedure (group 1), or first view on the post-biopsy mammogram obtained orthogonally to the projection used during the biopsy procedure (group 2). Masks of the pre-biopsy and post-biopsy mammograms were used to determine whether and how far the biopsy marker clip moved from the biopsy cavity.ResultsSixty-two biopsies were performed in 60 patients (mean age, 56 years; range, 30–78 years); 30 women (32 lesions) were randomized to group 1 and 30 women (30 lesions) were randomized to group 2. Marker clip migration occurred in 10 cases in group 1 (20% < 1cm, 30% 1–3cm, and 60% > 3cm) and 8 cases in group 2 (0 % < 1cm, 75% 1–3cm, and 25% > 3cm). The mean displacement distance was 0.84cm in group 1 and 0.67cm in group 2 (p = 0.83). The mean displacement distance difference was −0.17cm with a 95% bootstrap confidence interval from −0.87cm to 0.57cm.ConclusionThe type of projection used to obtain the first view on the post-biopsy mammogram, relative to that used during the stereotactic biopsy procedure, did not affect biopsy marker clip migration.



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