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Fibroadenoma of the breast
URL of this page: //medlineplus.gov/ency/article/007216.htm

Fibroadenoma of the breast

Fibroadenoma of the breast is a benign tumor. Benign tumor means it is not a cancer.

Causes

The cause of fibroadenomas is not known. They may be related to hormones. Girls who are going through puberty and women who are pregnant are most often affected. Fibroadenomas are found much less often in older women who have gone through menopause.

Fibroadenoma is the most common benign tumor of the breast. It is the most common breast tumor in women under age 30.

A fibroadenoma is made up of breast gland tissue and tissue that helps support the breast gland tissue.

Symptoms

Fibroadenomas are usually single lumps. Some women have several lumps that may affect both breasts.

The lumps may be any of the following:

  • Easily moveable under the skin
  • Firm
  • Painless
  • Rubbery

The lumps have smooth, well-defined borders. They may grow in size, especially during pregnancy. Fibroadenomas often get smaller after menopause (if a woman is not taking hormone therapy).

Exams and Tests

After a physical exam, one or both of the following tests are usually done:

  • Breast ultrasound
  • Mammogram

A biopsy may be done to get a definite diagnosis. Different types of biopsies include:

  • Excisional (removal of the lump by a surgeon)
  • Stereotactic (needle biopsy using a machine like a mammogram)
  • Ultrasound-guided (needle biopsy using ultrasound)

Women in their teens or early 20s may not need a biopsy if the lump goes away on its own or if the lump does not change over a long period.

Treatment

If a needle biopsy shows that the lump is a fibroadenoma, the lump may be left in place or removed.

You and your health care provider can discuss whether or not to remove the lump. Reasons to have it removed include:

  • Results of needle biopsy are not definitive
  • Pain or other symptom
  • Concern about cancer
  • The lump gets larger over time

If the lump is not removed, your provider will watch to see if it changes or grows. This may be done using:

  • Mammogram
  • Physical examination
  • Ultrasound

Sometimes, the lump is destroyed without removing it:

  • Cryoablation destroys the lump by freezing it. A probe is inserted through the skin, and ultrasound helps the provider guide it to the lump. Gas is used to freeze and destroy the lump.
  • Radiofrequency ablation destroys the lump using high-frequency energy. The provider uses ultrasound to help focus the energy beam on the lump. These waves heat the lump and destroy it without affecting nearby tissues.

Outlook (Prognosis)

If the lump is left in place and watched carefully, it may need to be removed at a later time if it changes or grows.

In very rare cases, the lump is cancer and will need further treatment.

When to Contact a Medical Professional

Contact your provider if you notice:

  • Any new breast lumps
  • A breast lump that your provider has checked before that grows or changes
  • Bruising on your breast for no reason
  • An area of redness of the skin of your breast
  • Breast skin that looks like an orange peel with thickening of the skin or enlargement of the pores
  • Dimpling or pulling in of the breast skin
  • New inversion of the nipple (nipple going inward instead of outward)
  • Nipple discharge that is clear (like water) or bloody

Alternative Names

Breast lump - fibroadenoma; Breast lump - noncancerous; Breast lump - benign

References

American College of Radiology website. ACR Appropriateness Criteria palpable breast masses. acsearch.acr.org/docs/69495/Narrative/. Updated 2022. Accessed February 4, 2024.

Klimberg VS, Hunt KK. Diseases of the breast. In: Townsend CM Jr, Beauchamp RD, Evers BM, Mattox KL, eds. Sabiston Textbook of Surgery. 21st ed. St Louis, MO: Elsevier; 2022:chap 35.

Vora H, Oseni TO. Breast. In: Cameron JL, Cameron AM, eds. Current Surgical Therapy. 14th ed. Philadelphia, PA: Elsevier; 2023:chap 12.

Review Date 4/1/2023

Updated by: Debra G. Wechter, MD, FACS, General Surgery Practice Specializing in Breast Cancer, Virginia Mason Medical Center, Seattle, WA. Internal review and update on 02/04/2024 by David C. Dugdale, MD, Medical Director, Brenda Conaway, Editorial Director, and the A.D.A.M. Editorial team.

Related MedlinePlus Health Topics

  • Benign Tumors
  • Breast Diseases

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06/01/2028

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The information provided herein should not be used during any medical emergency or for the diagnosis or treatment of any medical condition. A licensed medical professional should be consulted for diagnosis and treatment of any and all medical conditions. Links to other sites are provided for information only – they do not constitute endorsements of those other sites. No warranty of any kind, either expressed or implied, is made as to the accuracy, reliability, timeliness, or correctness of any translations made by a third-party service of the information provided herein into any other language. © 1997-2025 A.D.A.M., a business unit of Ebix, Inc. Any duplication or distribution of the information contained herein is strictly prohibited.

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