Anal fistulas

Last Updated: 2023-07-07

Author(s): Anzengruber F., Navarini A.

ICD11: DB50.1

In the anal region localised epithelial-lined fistulae.

Complete fistula tract: tract ends blindly.

Complete fistula tract: tract ends in an organ (e.g. bladder)


Division according to Parks:

  • Subcutaneous fistula
  • Submucosal fistula
  • Intersphincteric fistula
  • Transphincteric fistula
  • Suprasphincteric fistula
  • Extrasphincteric fistula
  • Recto-organic fistula

Fistula tract. Patients often report secretion, incontinence, pruritus. In the course of the disease, anal eczema may develop.


Clinical picture


Bacterial superinfection

Periproctitic  abscess

Very good after surgical therapy.