Translations:Anal fissure/2/en

Anatomy of the anus.

Anatomy of anal fissure.

• Superficial linear tear of anal canal from at/below dentate line to anal verge
  • May be due to passage of hard stool, frequent diarrhea, or abuse
• Most common cause of painful rectal bleeding
• In >90% of cases anal fissures occur in the midline posteriorly
  • Non-healing fissure or one not located in midline suggests alternative diagnosis (e.g. Crohn's, malignancy)