Fistulainano

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