If you are experiencing a medical emergency please dial 911 immediately
A cyst is a sac-shaped structure in the body. Cysts usually are filled with fluid, which may be blood, clear fluid, or pus.
A cyst can be normal, abnormal, or, in rare cases, cancerous. In some cases, a cyst may be drained either with a needle or by cutting it open, or it may be removed entirely.
Last Revised: February 7, 2012
Author: Healthwise Staff
Medical Review: Patrice Burgess, MD - Family Medicine & Kirtly Jones, MD - Obstetrics and Gynecology
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