Anal fistula physical examination

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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1] Associate Editor(s)-in-Chief:

Overview

Physical examination

Diagnosis is by examination, either in an outpatient setting or under anaesthesia (referred to as EUA - Examination Under Anaesthesia). The examination can be an anoscopy.

Possible findings:

  • The opening of the fistula onto the skin may be seen
  • The area may be painful on examination
  • There may be redness
  • An area of induration may be felt - thickening due to chronic infection
  • A discharge may be seen
  • It may be possible to explore the fistula using a fistula probe (a narrow instrument) and in this way it may be possible to find both openings of the fistula

References

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