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Cyst

Definition:

A cyst is a closed pocket or pouch of tissue. It can be filled with air, fluid, pus, or other material.



Considerations:

Cysts may form within any tissue in the body. Cysts within the lung generally are air-filled, while cysts involving the lymph system or kidneys are fluid-filled. Certain parasites, such as trichinosis , dog tapeworm (Toxocara canis), and echinococcus , can form cysts within the muscles, liver, brain, lungs, and eyes.

Cysts are common on the skin. They develop as a result of infection, clogging of sebaceous glands, or around foreign materials.

See also: Pilonidal dimple



Common Causes:



Home Care:



Call your health care provider if:



What to expect at your health care provider's office:




Review Date: 10/28/2008
Reviewed By: Michael Lehrer, M.D., Department of Dermatology, University of Pennsylvania Medical Center, Philadelphia, PA. Review provided by VeriMed Healthcare Network. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.

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