MRI Guided Biopsy
What is MRI-guided breast biopsy?
MRI-guided breast biopsy is a diagnostic procedure that is used to evaluate suspicious findings detected on a recent MRI exam and is often a preferred alternative to surgical biopsy. It is used when ultrasound or mammogram (stereotactic) guided biopsy is not appropriate because the area of concern is not well seen by a mammogram or ultrasound.
Guided by MR imaging, the doctor places a needle into the suspicious area and removes a sample. A core needle, which removes a small, cylindrical-shaped tissue sample, is used. The procedure requires only a topical anesthetic and leaves little to no scarring. MRI-guided breast biopsy costs less than a surgical biopsy, can be done in less than an hour and has no potential complications.
What are some common uses of the procedure?
An MRI-guided breast biopsy is most helpful when MR imaging shows a breast abnormality such as:
- a suspicious solid mass
- microcalifications, a tiny cluster of small calcium deposits
- a distortion in the structure of the breast tissue
- an area of abnormal tissue change
- a new mass or area of calcium deposits is present at a previous surgery site.
How should I prepare for this exam?
You may eat a light breakfast in the morning before your exam. You may shower or bathe before your procedure. However, please don't use deodorant, lotion, perfume or powder. Wear a comfortable bra and a sweater or top that opens down the front and can be easily put on after the procedure.
Take your usual medications, unless otherwise instructed by your physician. For 7 days before the biopsy DO NOT take products that may increase your risk of bleeding such as aspirin, ibuprofen, Advil, Motrin etc.
Please bring with you a list of all your medications, including frequency and dosages for each, and a list of any allergies you may have.
How is the procedure performed?
An MRI guided biopsy is performed in much the same manner as a routine breast MRI exam. A grid is applied to the surface of the breast to accurately identify the location of the abnormality. After injection of a local anesthetic, biopsy is then performed with a core biopsy device similiar to the one used for stereotactic biopsy. Usually a marker clip is placed after the biopsy to aid in future identification of the area biopsied.
What will I experience during and after the procedure?
You will be awake during your biopsy and should have little or no discomfort. Most women report little or no pain and no scarring on the breast.
If you experience swelling and bruising following your biopsy, you may be instructed to take an over-the-counter pain reliever and to use a cold pack. Temporary bruising is normal.
You should contact your physician if you experience excessive swelling, bleeding, drainage, redness or heat in the breast.
You should avoid strenuous activity for 24 hours after returning home, but then usually will be able to resume normal activities.
