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Comparison of the characteristic findings between PSC and IgG4-related SC (IgG4-SC).
| Favors PSC | Characteristic | Favors IgG4-SC |
|---|---|---|
| Short, multiple | Length of stricture | Long |
| Rare | Stricture of intrapancreatic bile duct | Often |
| Pruning | Intrahepatic bile ducts | Dilating |
