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Updated: Jul 5, 2026

Laparoscopic Choledochal Cyst Excision and Roux-en-Y Choledochojejunostomy in Adults
Published on: February 28, 2025
Synchronous Todani types I and III choledochal cysts in a 10-month-old-infant: type IVb
Oliver B Lao1, Sharon Stein, Kim A Ely
1Department of Surgery, University of Washington, 1959 NE Pacific Street, Box 356410, Seattle, WA 98195, USA. olao@u.washington.edu
Insights
This case report details a rare synchronous occurrence of Type I and Type III choledochal cysts in an infant. Successful surgical management highlights the importance of accurate diagnosis for pediatric biliary anomalies.
Area of Science:
- Pediatric Surgery
- Gastroenterology
- Medical Imaging
Background:
- Choledochal cysts are congenital biliary tract dilations, classified by Todani et al.
- Synchronous Type I and Type III choledochal cysts represent an extremely rare presentation.
- Pancreaticobiliary malunion is often associated with choledochal cysts.
Observation:
- A 10-month-old infant presented with jaundice, light stools, and irritability.
- Abdominal sonography revealed a Type I choledochal cyst and a separate cystic mass in the pancreatic head.
- MRCP confirmed Type I choledochal cyst and a coexisting Type III choledochocele with pancreaticobiliary malunion.
Findings:
- The infant underwent successful resection of the Type I choledochal cyst with Roux-en-Y hepaticojejunostomy.
- Marsupialization of the Type III choledochocele via anterior duodenotomy was performed.
- Five-year follow-up showed no symptom recurrence, with the child thriving.
Implications:
- Accurate identification of mixed choledochal cyst types is crucial for surgical planning.
- This case expands understanding of rare choledochal cyst associations beyond traditional classifications.
- Detailed reporting aids epidemiologic tracking and improves outcomes for rare pediatric biliary anomalies.
Abstract:
A 10-month-old, previously healthy boy presented with one week of mild jaundice, light-colored stools and irritability. Abdominal sonography showed a large type I choledochal cyst and a separate, distinct cystic mass at the head of the pancreas. Magnetic resonance cholangiopancreatography was performed to evaluate the relationship of the two lesions. A type I choledochal cyst was confirmed, and a coexisting type III choledochocele was identified as the second cystic structure in conjunction with pancreaticobiliary malunion. The infant had complete resection of the type I choledochal cyst with Roux-en-Y hepaticojejunostomy, and anterior duodenotomy with marsupialization of the choledochocele. After five years of follow-up, the child is thriving and has had no recurrence of his symptoms. An exhaustive review of the literature identifies only one previous case of synchronous types I and III choledochal cysts, and this association is not clearly defined among the traditional classifications of type IV multiple choledochal cysts. Because operative management of a type III cyst requires the addition of a transduodenal approach, we encourage accurate reporting of mixed type choledochal cysts for the benefit of surgical planning, epidemiologic tracking and outcomes.
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