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KEY FACTS
Terminology
Imaging
Top Differential Diagnoses
Pathology
Clinical Issues
TERMINOLOGY
Synonyms
- Long common channel
Definitions
- Pancreaticobiliary maljunction (PBM): Congenital malformation where pancreatic duct & common bile duct (CBD) join outside of duodenal wall
- Long common channel allows pancreatobiliary & biliopancreatic reflux
- Chronic pancreatobiliary reflux leads to high risk of gallbladder & biliary cancer
- Biliopancreatic reflux causes acute pancreatitis
- 2 types of PBM
- PBM with congenital biliary dilation
- PBM without congenital biliary dilation
- Congenital biliary dilation
- Previously referred to as type I or IVa choledochal cyst
- Requires enlarged diameter of CBD + PBM
- Definition for enlarged CBD depends on age
- Age 0 years: > 3 mm
- Age 5 years: > 3.9 mm
- Age 10 years: > 4.5 mm
- Age 15 years: > 5 mm
- Age 20 years: > 5.9 mm
- Pancreaticobiliary maljunction (PBM): Congenital malformation where pancreatic duct & common bile duct (CBD) join outside of duodenal wall
IMAGING
General Features
CT Findings
Ultrasonographic Findings
MR Findings
Other Modality Findings
Imaging Recommendations
DIFFERENTIAL DIAGNOSIS
PATHOLOGY
Staging, Grading, & Classification
CLINICAL ISSUES
Presentation
Demographics
Natural History & Prognosis
Treatment
DIAGNOSTIC CHECKLIST
Consider
Selected References
- Ono A et al: Imaging of pancreaticobiliary maljunction. Radiographics. 40(2):378-92, 2020
- Kamisawa T et al: Pancreaticobiliary maljunction: markedly high risk for biliary cancer. Digestion. 99(2):123-5, 2019
- Kamisawa T et al: Pancreaticobiliary maljunction and congenital biliary dilatation. Lancet Gastroenterol Hepatol. 2(8):610-8, 2017
- Hamada Y et al: Diagnostic criteria for congenital biliary dilatation 2015. J Hepatobiliary Pancreat Sci. 23(6):342-6, 2016
- Kamisawa T et al: Diagnostic criteria for pancreaticobiliary maljunction 2013. J Hepatobiliary Pancreat Sci. 21(3):159-61, 2014
- Wang CL et al: Magnetic resonance cholangiopancreatography study of pancreaticobiliary maljunction and pancreaticobiliary diseases. World J Gastroenterol. 20(22):7005-10, 2014
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References
Tables
Tables
KEY FACTS
Terminology
Imaging
Top Differential Diagnoses
Pathology
Clinical Issues
TERMINOLOGY
Synonyms
- Long common channel
Definitions
- Pancreaticobiliary maljunction (PBM): Congenital malformation where pancreatic duct & common bile duct (CBD) join outside of duodenal wall
- Long common channel allows pancreatobiliary & biliopancreatic reflux
- Chronic pancreatobiliary reflux leads to high risk of gallbladder & biliary cancer
- Biliopancreatic reflux causes acute pancreatitis
- 2 types of PBM
- PBM with congenital biliary dilation
- PBM without congenital biliary dilation
- Congenital biliary dilation
- Previously referred to as type I or IVa choledochal cyst
- Requires enlarged diameter of CBD + PBM
- Definition for enlarged CBD depends on age
- Age 0 years: > 3 mm
- Age 5 years: > 3.9 mm
- Age 10 years: > 4.5 mm
- Age 15 years: > 5 mm
- Age 20 years: > 5.9 mm
- Pancreaticobiliary maljunction (PBM): Congenital malformation where pancreatic duct & common bile duct (CBD) join outside of duodenal wall
IMAGING
General Features
CT Findings
Ultrasonographic Findings
MR Findings
Other Modality Findings
Imaging Recommendations
DIFFERENTIAL DIAGNOSIS
PATHOLOGY
Staging, Grading, & Classification
CLINICAL ISSUES
Presentation
Demographics
Natural History & Prognosis
Treatment
DIAGNOSTIC CHECKLIST
Consider
Selected References
- Ono A et al: Imaging of pancreaticobiliary maljunction. Radiographics. 40(2):378-92, 2020
- Kamisawa T et al: Pancreaticobiliary maljunction: markedly high risk for biliary cancer. Digestion. 99(2):123-5, 2019
- Kamisawa T et al: Pancreaticobiliary maljunction and congenital biliary dilatation. Lancet Gastroenterol Hepatol. 2(8):610-8, 2017
- Hamada Y et al: Diagnostic criteria for congenital biliary dilatation 2015. J Hepatobiliary Pancreat Sci. 23(6):342-6, 2016
- Kamisawa T et al: Diagnostic criteria for pancreaticobiliary maljunction 2013. J Hepatobiliary Pancreat Sci. 21(3):159-61, 2014
- Wang CL et al: Magnetic resonance cholangiopancreatography study of pancreaticobiliary maljunction and pancreaticobiliary diseases. World J Gastroenterol. 20(22):7005-10, 2014
