Needle Localization Using Mammography
Needle localization is done before a breast biopsy or lumpectomy. It is done to locate a site of concern that can be seen on a mammogram, but cannot be felt.
Using mammography, a radiologist will place a fine, thread-like wire to the site in your breast. The wire will guide the surgeon to the tissue to be removed.
You will check into the UW Outpatient Surgery Center where you will change into a gown and robe. You will have an IV started. You will be brought by wheelchair to the Breast Center for the procedure.
During The Procedure
You will begin by having a mammogram of your breast. Your breast will be compressed between two paddles. You will be asked to stay very still so your breast does not move.
- The staff will clean the breast.
- The doctor will inject the numbing medicine (lidocaine) into your breast. You will feel a sting, but our goal is that you not feel any pain after this is given.
- A small needle is placed into your breast at the site of concern. You may feel pressure during the procedure. If you feel pain, please let the staff know so that we can help lessen any discomfort or pain.
- When the needle is placed, a second mammogram will be taken to confirm that the needle is in the correct place. The needle may need to be moved and further mammograms taken to make sure the needle is in the right place.
Once the needle is in the correct place, the radiologist will remove the needle leaving a thin, thread-like wire in place. The wire will stick out of your breast and will be taped in place. More pictures are taken to confirm the wire placement. Films will be sent with you so that the surgeon may refer to them during your surgery.
After The Procedure
You will be taken by wheelchair back to the Outpatient Surgery center. They will take you to an operating room. If you are having a biopsy, you will be given medicine through the IV to help you relax. You will still be awake during the procedure. If you are having a lumpectomy, you will receive anesthesia that will put you to sleep.
Once you have been prepared for surgery, the surgeon will make an incision into your breast to remove the wire and the tissue around it. When the tissue is removed, it is x-rayed to assure that the tissue contains the same site that was seen on the mammogram.
The tissue is sent to our lab where a pathologist will look under a microscope to see what types of cells are present.
Reports are sent to your surgeon when the results are complete. This takes about 4 days. Your surgeon will contact you to discuss results with you.
The information provided should not be used during any medical emergency or for the diagnosis or treatment of any medical condition. A licensed physician should be consulted for diagnosis and treatment of any and all medical conditions. Call 911 for all medical emergencies. Any duplication or distribution of the information contained herein is strictly prohibited.
Last Updated: 07/30/2008
Copyright © 07/30/2008 University of Wisconsin Hospitals and Clinics Authority. All rights reserved. Produced by the Department of Nursing. UWH #5904
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