Double duct sign of cholangiopancreatography

What is the double duct sign of cholangiopancreatography? 

  • A stricture or complete obstruction of the intrapancreatic common bile duct and another stricture or complete obstruction of the main pancreatic duct nearby constitute the double duct sign.
  • The most common malignant cause is adenocarcinoma of the pancreatic head; cholangiocarcinoma, lymphoma, and metastasis are occasional causes.
  • The most common benign cause is chronic pancreatitis
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