Choledochal cyst

Choledochal cysts (a.k.a. bile duct cyst) are congenital conditions involving cystic dilatation of bile ducts. [Source: Wikipedia ]

May Cause

Anechoic liver lesion

Congenital biliary tract abnormality

Cystic abdominal mass in a fetus or newborn

Cystic and saccular lesions of bile ducts with dilatation of intrahepatic bile ducts

Cystic and saccular lesions of bile ducts with normal-sized intrahepatic bile ducts

Cystic fetal abdominal mass

Cystic fetal upper abdominal mass

Cystic liver lesion

Dilated bile ducts

Double bubble sign

Duodenal narrowing or obstruction

Extrinsic deformity of gallbladder

Extrinsic indentation on duodenum

Focal hypodense liver lesion

Increased retrogastric or retroduodenal space

Intestinal obstruction in a newborn

Mass in the porta hepatis

Solitary intrinsic duodenal mass

Upper abdominal mass in a neonate or child

Widening of duodenal C-loop