"Micro-gallbladder"--a clue to cystic fibrosis.

We report a patient with cystic fibrosis and biliary symptoms who demonstrates a tiny gallbladder on oral cholecystography and ultrasonography which should suggest the diagnosis of cystic fibrosis. The term "micro-gallbladder" has been introduced to describe the type of gallbladder seen in cystic fibrosis patients with biliary disease.