[Gastrointestinal lesions in liver cirrhosis].

The gastrointestinal bleeding commonly observed in patients with liver cirrhosis is usually from esophageal and gastric varices, gastroduodenal ulcer, and congestive gastropathy. Portal hypertension is the major causative factor of pathogenesis of GI lesions. In the present review, we focus in gastric mucosal defense and Helicobacter pylori infection in liver cirrhosis. Gastric mucosal defense is reduced in liver cirrhosis, especially prostaglandins which play a role in the gastric mucosal defense decreased in the gastric mucosal of patients with liver cirrhosis and rat portal hypertension model. Although H. pylori is strongly associated with peptic ulcer disease and chronic gastritis, several studies showed no relationship between H. pylori infection and gastroduodenal ulcer or the infection and congestive gastropathy in liver cirrhosis. Reduced gastric mucosal defense may account for the pathogenesis of GI lesions in liver cirrhosis.