Lemmel's Syndrome: Usual Presentation of an Unusual Diagnosis.

Lemmel's syndrome causes obstructive jaundice in the absence of stones or tumors. The most common cause is the presence of periampullary diverticula which arise within 2-3 cm from the ampulla of Vater. Diverticula may be extramural or intramural. Despite current practice of obtaining imaging studies such as ultrasound, CT, and MRI, endoscopic retrograde cholangiopancreatography (ERCP) is the gold standard diagnostic test. Lemmel's syndrome should be considered when pancreaticobiliary disease is suspected. We present a case in which our patient presented with abdominal pain, fever, and transaminitis who underwent ERCP which was successful in diagnosis of Lemmel's syndrome and its treatment. Although rare, it is imperative for physicians to recognize this syndrome in order to deliver prompt care.