Abstract：【Objective】To analyze the sonographic findings of fetal biliary dilatation to predict clinical prognosis.【Methods】We retrospectively studied the prenatal ultrasound screening of fetal biliary dilation (BD) from March 2018 to August 2020 in our hospital. The ultrasonic characteristics of BD and changes of cystic mass before and after birth were analyzed to track the prognosis.【Results】Pregnant women were 19 to 35 (27.7±4.2) years old and the average gestational age for prenatal cystic mass to be discovered at the first time was 18.1 to 33.6 (25.2±3.4) weeks. There were 22 fetal BD cases diagnosed prenatally, including 17 female fetuses (77.3%) and 5 male fetuses (22.7%). The coincidence rate of postpartum ultrasound was 81.8% (18/22) and the misdiagnosis rate was 18.2% (4/22), including 1 case of cystic biliary atresia, 2 cases of liver cyst, and 1 case of cyst regression. Cystic masses were mostly located in the first hepatic hilar area and the periphery of the gallbladder. There were 3 cases of gallbladder ultrasound imaging without obvious filling in the gallbladder area; while the other 19 cases had normal gallbladder morphology. There were 13 cases of cystic masses showing irregular shape and 9 cases were regular in shape. All the cases showed clear boundaries. There were 2 cases with floating bright spots in the mass, and the rest showed normal ultrasound internally. In the 22 cases, only 1 case of intrahepatic bile duct dilation was seen and 21 cases of cystic mass were linked to intrahepatic bile duct are visible. Except for the 4 misdiagnosed cases, the cystic masses in the remaining cases increased with the prolonged gestational age.【Conclusions】Prenatal ultrasound screening is a good way to make diagnosis for fetal bile duct dilatation, which can improve the prognosis.
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2020, Vol. 37 
