Gallstone formation associated with weight reduction.

The author presents the case history of an obese patient in whom gallstones developed 5 months after she began a weight-loss program. Conservative management with chenodeoxycholic acid completely resolved cholelithiasis following four months of treatment. Gallstone-formation has traditionally been attributed to supersaturation of bile with cholesterol. However, the author proposes that the formation of gallstones may also be related to a change in gallbladder mechanics stimulated by dieting over an extended period. Recognition of this risk can lead to early diagnosis of gallstones, thus enhancing effective treatment by conservative methods.