Fetal Magnetic Resonance Imaging of Choledochal Cyst

Choledochal cysts (CCs) are rare congenital anomaly with characterized dilatation of intraor extrahepatic biliary duct or both. Prenatal diagnosis is increasing due to high resolution of ultrasound (US) and ultrafast sequences of magnetic resonance imaging (MRI) showing better delineation of the cyst to the adjacent structure. Considering the additional value of the fetal MRI report is still infrequent to confirm the CC case, we therefore report the type I of CC, which was previously diagnosed as a cystic biliary atresia (CBA) from US result. Postnatal MRI and histopathology prove it.