Anal fissure classification

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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Associate Editor(s)-in-Chief: Amandeep Singh M.D.[2]

Overview

Anal fissures can be divided into primary and secondary anal fissures, based on etiology; posterior and anterior anal fissures based on location; and acute and chronic anal fissures based on the duration of symptoms.

Classification

Anal fissures are divided into different categories according to different classification systems:[1][2][3][4]

  • Anal fissure may be classified into several subtypes based on location:
    • Posterior anal fissures- it is found in 90% cases.
    • Anterior anal fissures- seen in 10% of cases.
  • Based on the duration of symptoms, an anal fissure may be classified as either acute (4-8 weeks), or chronic.

References

  1. Schlichtemeier S, Engel A (2016). "Anal fissure". Aust Prescr. 39 (1): 14–7. doi:10.18773/austprescr.2016.007. PMC 4816871. PMID 27041801.
  2. Wehrli H (1996). "[Etiology, pathogenesis and classification of anal fissure]". Swiss Surg (in German) (1): 14–7. PMID 8871258.
  3. Lund JN, Scholefield JH (1996). "Aetiology and treatment of anal fissure". Br J Surg. 83 (10): 1335–44. PMID 8944447.
  4. Herzig DO, Lu KC (2010). "Anal fissure". Surg. Clin. North Am. 90 (1): 33–44, Table of Contents. doi:10.1016/j.suc.2009.09.002. PMID 20109631.

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