ICD-11 classes
13 Diseases of the digestive system
Diseases of anal canal
Acquired anatomical alterations of the anal canal
DB50 — Fissure or fistula of anal regions
DB50.1 — Anal fistula

ICD-11 DB50.1 — Anal fistula

Anal fistula is an abnormal communication, hollow tract lined with granulation tissue connecting the primary opening inside the anal canal to a secondary opening in the perineal skin. They are usually associated with anorectal abscesses, and they are thought to be a chronic condition after an abscess evacuation.

The diagnosis includes nothing.

The diagnosis excludes nothing.

It has no clarifying diagnoses.