Renal and biliary calculi are too common to need mention here.

Endoscopic sphincterotomy was performed in 469 patients for the treatment of biliary calculi, with procedure-related morbidity of 6.3% and mortality of 0.4%.

( Biliary Calculi, Cholelithiasis).-Casesof gall stones are rare under the age of twenty-fiveyears.