Colonic vasodilation

Colonic vasodilation is a collective term for a group of colonic vascular malformations, consisting of benign non-tumorous dilated vascular plexus, also known as colonic vascular dysplasia, colonic vasodilation, and colonic arteriovenous malformations. In 1960, Margulis first confirmed the presence of colonic vasodilation through mesenteric arteriovenous angiography, and reports have gradually increased since then. It is found in recent years that the disease is one of the main causes of lower gastrointestinal bleeding, especially in elderly patients, accounting for about 4% of all causes of lower gastrointestinal bleeding. With the widespread application of fiber colonoscopy, there have been more and more reports of colonic vasodilation in patients with liver cirrhosis and portal hypertension. Chen et al. Reported that approximately 50% of patients with portal hypertension have colon vasodilation.