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Ischemic proctosigmoiditis

A E Bharucha1, W J Tremaine, C D Johnson

  • 1Division of Gastroenterology, Mayo Clinic, Rochester, Minnesota, USA.

The American Journal of Gastroenterology
|November 1, 1996
PubMed
Summary
This summary is machine-generated.

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Isolated ischemic proctosigmoiditis is a rare condition affecting elderly patients with atherosclerosis. Prompt recognition and differentiation from inflammatory bowel disease are crucial for appropriate management and treatment.

Area of Science:

  • Gastroenterology
  • Vascular Surgery
  • Colorectal Surgery

Background:

  • Rectal ischemia, or ischemic proctosigmoiditis, is uncommon due to robust collateral circulation.
  • While often accompanying more extensive colonic ischemia, it can manifest in isolation.

Purpose of the Study:

  • To identify and characterize cases of isolated ischemic proctosigmoiditis.
  • To differentiate this condition from other causes of rectal inflammation and guide therapeutic strategies.

Main Methods:

  • Retrospective review of 328 patients diagnosed with colonic ischemia between 1976 and 1991.
  • Inclusion criteria: rectosigmoid involvement ≤30 cm above the dentate line.
  • Analysis of clinical, endoscopic, radiological (CT, aortography), and pathological data.

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Main Results:

  • Ten patients (3.0%) had isolated ischemic proctosigmoiditis.
  • Six acute (<4 weeks), four chronic (≥4 weeks).
  • Elderly patients with atherosclerosis; precipitating factors identified in 4/6 acute and 1/4 chronic cases. CT showed rectal wall thickening/perirectal stranding; angiography revealed aortoiliac disease.

Conclusions:

  • Ischemic proctosigmoiditis is rare and distinct from generalized colonic ischemia.
  • Acute cases often have identifiable precipitating factors; conservative management is suitable for uncomplicated cases.
  • Chronic cases may lead to perforation, requiring proctectomy or diversion; differentiation from inflammatory bowel disease is critical.