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Anorectal abscess - Overview

Alternative Names

Anal abscess; Rectal abscess; Perirectal abscess; Perianal abscess; anal gland abscess; Abscess - anorectal

Definition of Anorectal abscess:

An anorectal abscess is a collection of pus in the area of the anus and rectum.

Causes, incidence, and risk factors:

Common causes of anorectal abscess include:

  • Blocked gland in the area
  • Infection of an anal fissure
  • Sexually transmitted infection

Deep rectal abscesses may be caused by intestinal disorders such as Crohn's disease.

The following factors increase your risk for an anorectal abscess:

  • Anal sex
  • Chemotherapy drugs used to treat cancer
  • Diabetes
  • Inflammatory bowel disease (Crohn's disease and ulcerative colitis)
  • Use of medications such as prednisone
  • Weakened immune system (such as from HIV/AIDS)

The condition may occur in infants and toddlers who are still in diapers and who have a history of anal fissures.

  • Reviewed last on: 9/10/2010
  • Shabir Bhimji, MD, PhD, Specializing in Cardiothoracic and Vascular Surgery, Midland, TX. Review provided by VeriMed Healthcare Network. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.
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