Neglected radiologic signs of the glucagonoma syndrome.

A case of glucagonoma where repeated gastrointestinal examinations revealed excessive mucosal fold thickening of the duodenum and small bowel with a markedly delayed transit time is reported. These findings in the appropriate clinical setting led us to persevere with further investigations despite equivocal ultrasound and CT examinations. We wish to emphasize the importance of the classical gastrointestinal findings in the diagnosis of the glucagonoma syndrome.