Breast Biopsy Clips: Removal After Placement
Biopsy clips placed after breast core needle biopsy are typically NOT removed as a separate procedure and remain permanently in the breast tissue. 1
Purpose of Clip Placement
The marker clip serves critical functions according to NCCN guidelines:
- Identifies the biopsy location if the lesion is entirely removed during the biopsy itself
- Marks the tumor bed if the lesion disappears during neoadjuvant (pre-operative) chemotherapy treatment
- Guides surgical excision when wire localization or other localization methods are used to bracket the clipped area 1
When Clips Are Removed
The clip is removed only incidentally during definitive surgical treatment, not as a separate procedure:
During Excisional Biopsy or Lumpectomy
- When a patient requires surgical excision (for indeterminate lesions, atypical findings, or cancer), the surgeon removes the tissue containing the clip along with the targeted lesion
- Wire localization performed immediately before surgery uses the clip as a target to guide tissue removal 1, 2
After Neoadjuvant Chemotherapy
- If the tumor shrinks or disappears completely with chemotherapy, the clip marks where the original tumor was located
- The surgeon removes the clipped area even if no visible tumor remains 3, 4
For Benign Results
- If the biopsy shows benign findings and no further surgery is needed, the clip stays in place permanently
- The clip is made of biocompatible materials (typically titanium or ceramic) and causes no harm
- It may be visible on future mammograms but does not interfere with breast imaging 5
Important Clinical Considerations
Clip migration can occur in 21.5% of cases by more than 20mm from the original site, with an average migration of 13.5mm 6. This is why:
- Surgeons cannot rely solely on clip location for excision
- The original biopsy site characteristics (hematoma, architectural distortion) guide surgery alongside the clip 6
Clip loss during surgery occurs in approximately 3.8% of cases, typically from inadvertent removal via surgical suction devices 7. When the clip is missing on specimen radiograph, post-operative mammography can identify if it remains in the breast 8.
The clip serves as a permanent marker for radiation therapy planning after breast conservation surgery, helping to identify the tumor bed for radiation boost 5.