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CT and MR diagnoses of intestinal ischemia
1Department of Diagnostic Radiology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea.
Abstract:
CT and MR imaging have an important role in establishing the diagnosis of mesenteric ischemia. However, without specific signs such as thromboembolism in the mesenteric vessel, intramural or portal venous gas, and the absence of bowel wall enhancement, mesenteric ischemia can be confused with inflammatory or neoplastic gastrointestinal diseases. Arterial or venous occlusion or low-flow state are the main direct causes of mesenteric ischemia. Delayed diagnosis in equivocal cases can be avoided through an understanding of the patholophysiological aspects of mesenteric ischemia as they occur in a variety of other conditions, including: thromboembolism, bowel obstruction, neoplasm, vasculitis, inflammatory diseases, trauma, and drug or radiation therapy.
Insights
Diagnosing mesenteric ischemia using CT and MR imaging requires careful attention to specific signs. Understanding the pathophysiology of mesenteric ischemia can prevent misdiagnosis in complex cases.
Area of Science:
- Radiology
- Gastroenterology
- Vascular Surgery
Background:
- Computed tomography (CT) and magnetic resonance (MR) imaging are crucial for diagnosing mesenteric ischemia.
- Diagnostic challenges arise when specific signs are absent, leading to potential confusion with inflammatory or neoplastic gastrointestinal diseases.
- Understanding the underlying pathophysiology is key to accurate diagnosis.
Purpose of the Study:
- To highlight the role of CT and MR imaging in diagnosing mesenteric ischemia.
- To emphasize the importance of recognizing specific imaging findings.
- To discuss how understanding pathophysiology can prevent misdiagnosis in equivocal cases.
Main Methods:
- Review of imaging findings in mesenteric ischemia.
- Analysis of differential diagnoses for mesenteric ischemia.
- Discussion of pathophysiological mechanisms contributing to mesenteric ischemia.
Main Results:
- Specific signs like thromboembolism, intramural or portal venous gas, and lack of bowel wall enhancement are critical for diagnosis.
- Mesenteric ischemia can be mimicked by inflammatory or neoplastic conditions.
- Arterial/venous occlusion or low-flow states are primary causes.
Conclusions:
- Accurate diagnosis of mesenteric ischemia relies on recognizing key imaging features.
- Knowledge of mesenteric ischemia's pathophysiology aids in differentiating it from other gastrointestinal diseases.
- Early and accurate diagnosis is essential to avoid delayed treatment.