Prenatal sonographic diagnosis of biliary tract malformations

Area of Science:

• Medical Imaging
• Pediatric Surgery
• Fetal Medicine

Background:

• Congenital biliary tract malformations encompass diverse conditions like biliary atresia and choledochal cysts.
• While often rare and benign, these anomalies can pose significant risks to newborns.
• Routine second-trimester anomaly ultrasound scans should include gallbladder assessment.

Purpose of the Study:

• To review the detection rates of congenital biliary tract malformations using prenatal sonography.
• To describe the characteristic sonographic features of these fetal anomalies.
• To discuss the prognosis associated with frequently diagnosed prenatal biliary tract malformations.

Main Methods:

• Review of existing literature on prenatal diagnosis of biliary tract anomalies.
• Analysis of sonographic findings in cases of fetal biliary malformations.
• Correlation of prenatal diagnosis with postnatal outcomes.

Main Results:

• Prenatal sonography is advancing in its ability to detect biliary tract congenital malformations.
• Specific malformations discussed include biliary atresia, choledochal cysts, gallbladder agenesis, congenital cholelithiasis, and gallbladder duplication.
• Detection rates, sonographic features, and prognoses are detailed for common prenatal diagnoses.

Conclusions:

• Prenatal ultrasound plays a vital role in identifying congenital biliary tract anomalies.
• Routine screening, particularly gallbladder visualization, is recommended in the second-trimester anomaly scan.
• Accurate prenatal diagnosis aids in timely management and improves outcomes for affected infants.