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. Most cysts is the lungs are filled with air.Cyststhat form inthe 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 can developfrom a clogged sebaceous glands (acne-related cysts) or form around something stuck in the skin. These cysts are benign (not cancer) but can cause pain and changes in appearance.
Cysts can be drained or removed with surgery depending on the type and location of the growth.
Apilonidal dimple is a type of cyst.
References
Stone MS. Cysts. In: Bolognia JL, Jorizzo JL, Schaffer JV, et al, eds.Dermatology. 3rd ed. Philadelphia, Pa:Mosby Elsevier; 2012:chap 110.
Reviewed By: Kevin Berman, MD, PhD, Atlanta Center for Dermatologic Disease, Atlanta, GA. Review provided by VeriMed Healthcare Network. Also reviewed by A.D.A.M. Health Solutions, Ebix, Inc., Editorial Team: David Zieve, MD, MHA, David R. Eltz, Stephanie Slon, and Nissi Wang.
