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Biliary lipids and bile acid composition before and after endoscopic sphincterotomy.

The effect induced by endoscopic sphincterotomy on biliary lipids and bile acid composition was examined by following up the seven patients prior to early (1-2 week) and late (0.5-1 year) after the endoscopic sphincterotomy. The concentrations of total bile acids, phospholipid and cholesterol were essentially constant throughout the one-year observation period. Cholesterol saturation indices were not significantly altered. No bile acid concentration changed significantly. The results indicate that endoscopic sphincterotomy has little undesirable effect on the biliary lipids and bile acid compositions over an observed period.