[Lemmel's syndrome: report of a case].

Lemmel's syndrome is a very rare condition as a cause of obstructive jaundice secondary to the presence of a duodenal diverticulum. We report a case, a 68-year-old female patient with a cholestatic pattern, biliary tract dilatation, who underwent ERCP, with a juxtapapillary diverticulum compressing the distal bile duct, which was sphincterotomy.