Recognizing pitfalls in early and late migration of clip markers after imaging-guided directional vacuum-assisted biopsy.

Directional vacuum-assisted biopsy has become an irreplaceable tool in the management of suspicious mammographic lesions. Often, the entire lesion is removed and clips are used to localize the biopsy site. Postbiopsy mammograms are used to determine the adequacy of clip placement and the location of the clip.