Aug 242013

Pilonidal Cyst / Sinus is found in the intergluteal cleft on the posterior surface of the lower sacrum polonidal cyst Latin meaning ‘hair nest’ is a blanket term for any type of skin infection near the tail bone (coccyx).


  • More in men
  • Normally happen in early adulthood
  • Usually found near tail bone
  • Other – navel, armpit

Pilonidal Cyst results from local trauma that causes the penetration of hairs into the epithelium and subcutaneous tissue. Formed congenitally by an infoling of epithelial tissue beneath the skin which may communicate with the skin surface through one or several small sinus opening.


  • Cause idiopathic
  • Old, theory –> a small and harmless cyst has always been present at birth and that for some reasons, it has become irritated and formed a painful abscess.
  • Another explanation –> It is an in grown air that has formed an abscess.


Condition was wide spread in US army during world war II. More than eighty thousands soldiers having the condition required hospitalization. It was termed ‘Jeep Siders disease’, because a large portion of people who were being hospitalized for it rode in jeeps and it was theorized that prolonged sides in the bumpy vehicles caused the condition.

Clinical features:

  • Irritating drainage.
  • Abscess
  • Pain

 Diagnosis: Physical examination


  • Antibiotic therapy, hot compress, application of deplilatory creams.
  • After the acute process resolves, further surgery is performed to excise the cyst and the secondary sinus tract. The wound is allowed to heal by granulation. Gauze dressings are placed in the wound to keep its edge separated while healing occurs.

Complication: Death because of septicemia.

 Posted by at 12:18 pm