How you prepare

Before the breast biopsy, tell your doctor if you:

  • Have any allergies
  • Have taken aspirin in the last seven days
  • Are taking blood-thinning medications (anticoagulants)
  • Are unable to lie on your stomach for an extended period of time

If your biopsy will be done using magnetic resonance imaging (MRI), tell your doctor if you have a cardiac pacemaker or other electronic device implanted in your body or if you're pregnant or think you may be pregnant. An MRI generally isn't recommended under these circumstances.

Wear a bra to your appointment. Your health care team may place a cold pack against the biopsy site after the procedure, and the bra can hold the cold pack in place and provide support for your breast.

Nov. 22, 2016
References
  1. Esserman LJ, et al. Breast biopsy. http://www.uptodate.com/home. Accessed June 3, 2016.
  2. For women facing a breast biopsy. American Cancer Society. http://www.cancer.org/treatment/understandingyourdiagnosis/examsandtestdescriptions/forwomenfacingabreastbiopsy/. Accessed June 3, 2016.
  3. Having a breast biopsy: A review of the research for women and their families. Agency for Healthcare Research and Quality. https://www.effectivehealthcare.ahrq.gov/ehc/index.cfm/search-for-guides-reviews-and-reports/?pageAction=displayProduct&productID=2234. Accessed June 3, 2016.
  4. Ultrasound-guided breast biopsy. RadiologyInfo.org. http://www.radiologyinfo.org/en/info.cfm?pg=breastbius. Accessed June 3, 2016.
  5. Magnetic resonance (MRI)-guided breast biopsy. RadiologyInfo.org. http://www.radiologyinfo.org/en/info.cfm?pg=breastbimr. Accessed June 3, 2016.
  6. Pfenninger JL, et al., eds. Breast biopsy. In: Pfenninger & Fowler’s Procedures for Primary Care. 3rd ed. Philadelphia, Pa.: Mosby Elsevier; 2011. http://www.clinicalkey.com. Accessed June 3, 2016.
  7. AskMayoExpert. Percutaneous biopsy. Rochester, Minn.: Mayo Foundation for Medical Education and Research; 2016.
  8. Lonzetta N, et al. Diagnosis and management of benign, atypical, and indeterminate breast lesions detected on core needle biopsy. Mayo Clinic Proceedings. 2014;89:536.