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DOI: 10.1148/radiol.2292021594
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Clip or Marker Migration 5–10 Weeks after Stereotactic 11-gauge Vacuum-assisted Breast Biopsy: Report of Two Cases1

Robyn L. Birdwell, MD and Roger J. Jackman, MD

1 From the Department of Radiology, Stanford University Medical Center, 300 Pasteur Dr, Stanford, CA 94305 (R.L.B.), and the Department of Radiology, Palo Alto Medical Clinic. Received November 27, 2002; revision requested January 30, 2003; revision received February 25; accepted April 14. Address correspondence to R.L.B. (e-mail: birdwell@stanford.edu).



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  		Figure 1a. Case 1. Mammograms of a 50-year-old woman who underwent vacuum-assisted biopsy for a small indistinct mass in the upper outer quadrant of the right breast that was diagnosed as atypical ductal hyperplasia and lobular carcinoma in situ. (a) Initial postprocedure lateral mammogram demonstrates accurate clip placement (arrow). (b) Pre-needle localized surgical biopsy lateral mammogram obtained 5 weeks later demonstrates 6.5-cm caudal clip migration (arrow).

 


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  		Figure 1b. Case 1. Mammograms of a 50-year-old woman who underwent vacuum-assisted biopsy for a small indistinct mass in the upper outer quadrant of the right breast that was diagnosed as atypical ductal hyperplasia and lobular carcinoma in situ. (a) Initial postprocedure lateral mammogram demonstrates accurate clip placement (arrow). (b) Pre-needle localized surgical biopsy lateral mammogram obtained 5 weeks later demonstrates 6.5-cm caudal clip migration (arrow).

 


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  		Figure 2a. Case 2. Mammograms of a 51-year-old woman in whom atypical ductal hyperplasia was diagnosed with vacuum-assisted core biopsy. (a) Initial postprocedure lateral mammogram demonstrates accurate marker placement (arrow). (b) Ten weeks after core biopsy, pre-surgical biopsy lateral mammogram demonstrates 4.5-cm caudal marker migration (arrow).

 


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  		Figure 2b. Case 2. Mammograms of a 51-year-old woman in whom atypical ductal hyperplasia was diagnosed with vacuum-assisted core biopsy. (a) Initial postprocedure lateral mammogram demonstrates accurate marker placement (arrow). (b) Ten weeks after core biopsy, pre-surgical biopsy lateral mammogram demonstrates 4.5-cm caudal marker migration (arrow).

 




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