pilonidal cyst

pilonidal cyst

Etymology: L, pilus + nidus, nest

a cyst that often develops in the sacral region of the skin. Pilonidal cysts may sometimes be recognized at birth by a depression, sometimes by a hairy dimple in the midline of the back in the sacrococcygeal area. Usually these cysts do not cause any problems, but occasionally a sinus or fistula develops in early adulthood that communicates with the skin, resulting in infection. A fistula also may develop to the spinal tract from a pilonidal cyst. If a cyst becomes infected or inflamed, it is excised, and the space is surgically closed after the infection or inflammation has been effectively treated.

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pilonidal cyst

Dermatology A type of abscess found in the cleft between the buttocks in adolescents after prolonged sitting

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Patient discussion about pilonidal cyst.

Q. What is pilonidal cyst?

A. A pilonidal cyst, also referred as sacrococcygeal fistula, is a blanket term for any type of skin infection near the tailbone. The condition is also referred as pilonidal sinus disease. It is usually painful. http://en.wikipedia.org/wiki/Pilonidal_cyst
This is a good site also:
http://www.pilonidal.org/whatitis.htm
Hope this helps.