Cyst
Definition
A cyst is a closed pocket or pouch of tissue. It can be filled with air, fluid, pus, or other material.
Alternative Names
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 (acne-related cysts), or around a foreign object stuck in the skin.
See also: Pilonidal dimple
Common Causes
Home Care
Call your health care provider if
What to expect at your health care provider's office
visHeader
References
Habif TM. Principles of diagnosis and anatomy. In: Habif TP, ed. Clinical Dermatology. 5th ed. Philadelphia, Pa: Mosby Elsevier; 2009:chap 1.
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