What causes proctitis and anusitis?

Updated: Mar 27, 2020
  • Author: David E Stein, MD; Chief Editor: John Geibel, MD, MSc, DSc, AGAF  more...
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This article divides the etiologies of proctitis into the following three categories:

  • Proctitis due to inflammatory bowel colitides (eg, ulcerative colitis, Crohn disease)
  • Proctitis from infectious causes (eg, Clostridium difficile and Salmonella species); in most cases, the rectal inflammation caused by an infection most likely causes inflammation in the colon as well
  • Proctitis due to noninfectious conditions (eg, diversion, ischemia, and radiation)

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