Ischemic Colitis Epidemiology and Management

Ischemic colitis arises when blood flow to the colon is insufficient to meet metabolic demands, leading to mucosal injury, inflammation and, in severe cases, gangrene. It is the most common form of intestinal ischaemia, predominantly affecting older adults with cardiovascular comorbidities such as atherosclerosis, heart failure or hypotensive episodes. The annual incidence is estimated at 15–20 cases per 100 000 population, with a female predominance reported in many series. Key precipitating factors include arterial occlusion, non-occlusive hypoperfusion and venous outflow obstruction. Presentation ranges from mild, transient abdominal discomfort and rectal bleeding to fulminant disease requiring urgent surgery. Diagnosis combines clinical assessment with radiological imaging—especially contrast-enhanced computed tomography—and endoscopic evaluation to determine the distribution and severity of colonic injury. Management is dictated by disease severity: most patients with mild to moderate ischaemia recover fully under supportive measures (intravenous fluids, bowel rest and broad-spectrum antibiotics), whereas those with signs of transmural necrosis or perforation require prompt surgical resection. Mortality remains highest in the acute severe form, particularly when intervention is delayed. Recent advances have focused on early recognition of high-risk patients, refinement of imaging criteria to distinguish reversible from irreversible injury, and development of multidisciplinary care pathways to optimise outcomes. The global burden is rising in ageing populations, emphasising the need for heightened clinical awareness and standardised management protocols.

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Ischemic Colitis Epidemiology and Management publication trend

The graph below shows the total number of articles in ischemic colitis epidemiology and management across all publications each year (not limited to Nature Index journals).

Technical terms

Ischaemic colitis: Injury to the colon resulting from inadequate blood supply.

Non-occlusive ischaemia: Colonic hypoperfusion without arterial blockage, often due to systemic hypotension.

Mesenteric phlebosclerosis: Chronic venous fibrosis and calcification of mesenteric veins leading to colonic ischaemia.

Idiopathic myointimal hyperplasia of mesenteric veins (IMHMV): A rare condition characterised by smooth muscle proliferation in venous intima causing venous obstruction.

Computed tomography (CT): Cross-sectional imaging technique essential for assessing vascular patency and colonic wall changes.

Colonoscopy: Endoscopic examination of the colon used to visualise mucosal ischaemic changes and guide biopsy or resection.

References

1. Hangeshashinto-Associated Mesenteric Phlebosclerosis and Highly Atypical Adenoma Requiring Laparoscopic Right Hemicolectomy. Diagnostics (2024).
2. Idiopathic myointimal hyperplasia of the mesenteric veins: Case report and review of the literature. JGH Open (2019).
3. Advents in the Diagnosis and Management of Ischemic Colitis. Frontiers in Surgery (2017).
4. CT Findings in Acute, Subacute, and Chronic Ischemic Colitis: Suggestions for Diagnosis. BioMed Research International (2014).
5. Poor prognostic factors in patients who underwent surgery for acute non-occlusive ischemic colitis. World Journal of Emergency Surgery (2015).
6. A case of idiopathic myointimal hyperplasia of the mesenteric veins presenting with small bowel obstruction. Surgical Case Reports (2021).