title: The natural history of the post anal (pilonidal) sinus.
abstract: Forty-two military hospital patients with post anal (pilonidal) sinus disease who had returned a questionnaire were studied retrospectively. Overall recurrence rate after various treatments was high, and it is suggested this be considered a chronic disease with a natural regression. Seldom this point seems to be after the 30th birthday. However, there appears to be a small group that develop the condition for the first time in their fourth decade. Sitting down at work appears to be a significant (p = less than 0.05) factor in aetiology.
mesh_terms: D000328:Adult; D000367:Age Factors; D005260:Female; D006801:Humans; D008297:Male; D008887:Military Medicine; D010864:Pilonidal Sinus / Q000209:etiology / Q000601:surgery*; D011187:Posture; D012008:Recurrence; D012189:Retrospective Studies