An unusual cause of obstructive jaundice: Lemmel's syndrome.

Lemmel's syndrome is a rare and misdiagnosed cause of obstructive jaundice. The cause of the obstacle is a duodenal diverticulum located at the periampullary generating a compression effect on the common bile duct with secondary dilation of the extra- and intra-hepatic bile ducts. Late diagnosis of this entity is common and may lead to unnecessary further investigations and therapeutic delay. There are only few case reports of this rare condition. We report a case of 77-year-old female presenting with obstructive jaundice due to Lemmel's syndrome. The diagnosis was made on a set of clinical, biological and radiological arguments with good improvement after medical treatment.