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A pilonidal cyst, also referred to as a pilonidal abscess, pilonidal sinus or sacrococcygeal fistula, is a cyst or abscess near or on the natal cleft of the buttocks that often contains hair and skin debris.
Pilonidal cysts are often very painful, and typically occur between the ages of 15 and 35. Although usually found near the coccyx, the condition can also affect the navel, armpit or genital region, though these locations are much rarer.
The condition was widespread in the United States Army during World War II. The condition was termed "jeep seat" or "Jeep riders' disease" because a large portion of people who were being hospitalized for it rode in Jeeps, and prolonged rides in the bumpy vehicles were believed to have caused the condition due to irritation and pressure on the coccyx.
Pilonidal means nest of hair and is derived from the Latin words for hair (pilus) and nest (nidus).
March 23, 2016