A practical algorithm for accurate diagnosis and treatment of perinatally identified biliary ductal dilation: three cases that underscore the importance of an individualised approach
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Updated: Jun 22, 2026

Laparoscopic Common Bile Duct Exploration Followed by Primary Suture Using a Modified Bile Duct Incision
Published on: May 2, 2025
Alejandro R Ruiz-Elizalde1, Robert A Cowles
1Morgan Stanley Children's Hospital of New York - Presbyterian, Columbia University Medical Centre, New York, USA.
Insights
Prenatal diagnosis of choledochal cysts (CDC) is rare. This study suggests close postnatal observation and individualized therapy are crucial for managing biliary ductal dilation in newborns.
Area of Science:
- Pediatric Surgery
- Medical Imaging
- Neonatal Care
Background:
- Choledochal cysts (CDCs) are congenital bile duct dilatations, typically diagnosed later in childhood or adulthood.
- Prenatal or immediate postnatal diagnosis of CDCs is uncommon.
- Optimal timing for surgical intervention in prenatally diagnosed CDCs remains debated.
Observation:
- Presents three cases of infants with presumed CDC diagnosed via prenatal or postnatal imaging (ultrasound, MRI).
- These infants, initially suspected of having CDCs, ultimately required varied treatment approaches.
- The cases highlight the diagnostic challenges and diverse clinical presentations.
Findings:
- Initial imaging suggested choledochal cysts (biliary ductal dilation) in all three infants.
- Postnatal observation revealed distinct clinical courses and diagnostic resolutions.
- The eventual diagnoses and management strategies differed significantly among the cases.
Implications:
- Supports a strategy of close postnatal observation for infants with suspected prenatal choledochal cysts.
- Advocates for individualized, carefully planned therapeutic approaches rather than immediate surgical intervention.
- Emphasizes the need for reassessment after birth to confirm diagnosis and guide treatment for biliary ductal anomalies.
Abstract:
Choledochal cysts (CDCs) identified during the prenatal or immediate postnatal period are unusual with a majority being identified in older children and adults. Although authors advocate surgical resection of these presumed CDCs with reconstruction, there has been no agreement on the optimal timing of such an intervention when the initial diagnosis of CDC is made prenatally or during the newborn period. We present the cases of three children with biliary ductal dilation who were presumed to have CDC by ultrasound and/or magnetic resonance imaging during the perinatal period and who ultimately required different approaches to treatment. The eventual findings in these cases support a period of close postnatal observation followed by carefully planned individualised therapy.