[Abstract]: Objective To explore the ultrasound characteristics and outcome of fetal biliary atresia.Methods Retrospective analysis of the prenatal and postnatal ultrasound characteristics of 7 cases of fetal biliary atresia examined in the ultrasound department of our hospital from January 2015 to April 2020

as well as postoperative intraoperative angiography and postoperative outcomes.Results 4 cases of prenaal ultrasound showed cystic masses in the hilum of the liver

with regular morphology and good sound transmission. The size of the masses did not change significantly with the increase of gestational age

or slightly reduced

Gallbladder size does not change significantly with gestational age. After birth

the ultrasound showed that the gallbladder was small

stiff

without obvious contraction after meals

and fibrous plaques at the hilum of the liver. 3 cases of prenatal gallbladder were never shown

postnatal gallbladder was not shown

and fibrous plaque at the hilum of the liver. Outcome: 2 cases of maternal liver transplantation were successful

1 case of Kasai surgery was successful

1case had marked liver cirrhosis and is currently waiting for liver transplant

3 patients gave up treatment.Conclusion Prenatal ultrasound showed that the gallbladder has not been shown. The size of the cystic mass in the hilum of the whole pregnancy has not changed significantly

or the prenatal biliary atresia should be considered when the third trimester is smaller than the second trimester. Diagnosis of biliary atresia in time before childbirth

and early postpartum surgical treatment is very important for the prognosis of children.