[Ultrasound aspect of fascioliasis of the biliary tract].

Concerning two cases of biliary distomiasis, the authors describe the sonographic patterns leading to the ultrasonic diagnosis of this parasite. Gallbladder distomiasis appears as an echogenic, oval structure, without acoustic shadow. It characteristically displays mobility and variable shape. The aspect of common bile duct distomiasis is reported for the first time. It is a nonshadowing linear structure and however non specific.