Benign breast cysts

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Benign breast cysts

A cyst is a fluid-filled sac. Breast cysts usually do not contain cancer cells (are benign).

Some women who have lumpy breasts also have benign breast cysts that are surrounded by fibrous tissue. Some cysts cause lumps that can be seen or felt (palpable). A cyst that can be felt may move about under the fingers. Its texture depends on where it is located and how much fluid is in it. It may feel smooth or rubbery. It may be hard or soft.

A cyst may be painful and tender or may be painless. A cyst may get smaller after a menstrual period, or it may persist and grow larger. Some cysts can only be seen on a mammogram (breast X-ray) or with ultrasound.

The exact cause of breast cysts is unknown. They may be linked to the hormones of the menstrual cycle. Breast cysts are rare in women over 50.

Credits

Author	Jeannette Curtis
Author	Caroline Rea, RN, BS, MS
Editor	Kathleen M. Ariss, MS
Editor	Susan Van Houten, RN, BSN, MBA
Associate Editor	Tracy Landauer
Associate Editor	Pat Truman
Primary Medical Reviewer	Patrice Burgess, MD - Family Medicine
Primary Medical Reviewer	Adam Husney, MD - Family Medicine
Primary Medical Reviewer	Kathleen Romito, MD - Family Medicine
Last Updated	May 25, 2007

Last updated:	May 25, 2007
Author:	Caroline Rea, RN, BS, MS
Reviewed By:	Kathleen Romito, MD - Family Medicine
Editors:	Susan Van Houten, RN, BSN, MBA, Pat Truman

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