Ultrasound study shows a cystic mass between the pancreatic head and the gallbladder. Smooth wall and homogeneous anechoic content were detected.
The study is compatible with dilatation of entire extrahepatic bile duct, that's also known as a true choledochal cyst. Is the type 1 of Todani classification of bile duct cysts.
Unfortunately, no further imaging was made available for correlation with the ultrasound findings.