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Published on: August 23, 2022
[Pancreatico-biliary maljunction and congenital dilatation of bile duct]
1Department of Pediatric Surgery, Osaka University Medical School, Suita, Japan.
Insights
Congenital dilatation of bile duct (CDBD) is linked to pancreatico-biliary maljunction (PBM). Symptoms and morphology of CDBD depend on patient age and pancreatic juice reflux into the bile duct.
Area of Science:
- Gastroenterology
- Pediatric Surgery
- Pathology
Context:
- Congenital dilatation of the bile duct (CDBD), also known as choledochal cyst, frequently co-occurs with pancreatico-biliary maljunction (PBM).
- The clinical presentation and pathological features of CDBD are significantly influenced by the presence of PBM.
Purpose:
- To elucidate the relationship between pancreatico-biliary maljunction and the diverse clinical and morphological characteristics of congenital dilatation of the bile duct.
- To identify key factors influencing the presentation and pathology of choledochal cysts.
Summary:
- CDBD presents differently based on age; infants typically show cystic types with jaundice or palpable masses.
- Older children and adults may have cystic or cylindrical CDBD, often with abdominal pain and elevated amylase, indicative of pancreatic juice reflux.
- Histological findings reveal glandular formation and inflammation due to pancreatic juice reflux, or simple fibrous thickening, correlating with disease presentation.
Impact:
- Understanding these associations aids in accurate diagnosis and tailored management strategies for congenital biliary tract anomalies.
- Highlights the critical roles of age at onset and pancreatico-biliary reflux in shaping the clinical and pathological spectrum of choledochal cysts.
Abstract:
Congenital dilatation of bile duct (CDBD) or choledochal cyst has been demonstrated to be associated with pancreatico-biliary maljunction (PBM), and its various clinical signs and symptoms have been shown to be closely related with the presence of PBM. In almost all of the patients who were less than one year of age, the disease was of the cystic type and patients presented with either a palpable mass or jaunce as the main symptom. In patients with more than one year of age, the disease was of either the cystic or cylindrical type. A history of episodes of abdominal pain accompanied by elevated levels of serum amylase was present in most patients with both types of diseases. Histologic sections from the patients showed glandular formation with chronic inflammation, a result of refluxed activated pancreatic juice (possibly phospholipase A2): in contrast, histologic sections from the remaining patients of all ages showed only thickening of the fibrous layer. Thus, such variable morphologic features and clinical signs and symptoms in CDBD are highly dependent on two factors-the age at oset and the reflux of pancreatic juice into the bile duct through the common channel.
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