Gastroenterology Book

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Pilonidal CystAka: Pilonidal Sinus, Pilonidal Abscess

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  1. Epidemiology
    1. Infection occurs most often in males, age 16 to 30
  2. Predisposing factors
    1. Men
    2. Dark-skin
    3. Hirsutism
  3. Pathophysiology
    1. Pit forms at skin disruption in gluteal fold
    2. Pit plugs with hair and keratin
    3. Abscess forms when drainage of pit is blocked
  4. Symptoms
    1. Pain in gluteal fold
    2. No systemic symptoms
  5. Signs
    1. Midline tender swelling in gluteal fold over coccyx
  6. Management
    1. Incision and Drainage under Local Anesthesia
    2. Consider surgical referral for cyst and sinus excision
      1. See recurrence rates below
  7. Complications
    1. Recurrent infections: 10 to 90%
  8. References
    1. Marx (2002) Rosen's Emergency Medicine, p. 1952

Pilonidal Cyst (C0031925)

Definition (MSH)A hair-containing cyst or sinus, occurring chiefly in the coccygeal region.
ConceptsDisease or Syndrome (T047) , Anatomical Abnormality (T190)
ICD9685
EnglishCoccygeal fistula, Coccygeal sinus, Piliferous cyst, Pilonidal Cyst, Pilonidal Cysts, Pilonidal fistula, PILONIDAL SINUS, Pilonidal sinus/cyst
Spanishfístula coccígea, fístula pilonidal, fistula coccigea, fistula pilonidal, quiste pilífero, quiste pilifero, quiste pilonidal, seno coccígeo, seno coccigeo, seno pilonidal
CreditsDerived from the NIH UMLS (Unified Medical Language System)



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