Anal fistula causes

Anal fistula Microchapters
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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1] Associate Editor(s)-in-Chief: Manpreet Kaur, MD [2]

Causes

Anal fistula

Causes include:

• Actinomycosis
• Anal fissure
• Anorectal carcinoma
• Constipation
• Crohn's Disease
• Cryptitis
• Disease of the anal glands
• Gonorrhea
• HIV===Common Causes===

[Disease name] may be caused by:

• [Cause1]
• [Cause2]
• [Cause3]

OR

• [Disease name] is caused by an infection with [pathogen name].
• [Pathogen name] is caused by [pathogen name].

Less Common Causes

Less common causes of disease name include:

• [Cause1]
• [Cause2]
• [Cause3]
• Local radiation therapy
• Lymphogranuloma venerum
• Perirectal abscess sequelae of rupture or surgery
• Syphilis
• Thrombosed hemorrhoids
• Tuberculosis
• Ulcerative Colitis