Primary sclerosing cholangitis - What is the difference between east and west?

Table 1 Mayo criteria for the diagnosis of PSC[27]

	Mayo criteria
Typical cholangiographic abnormalities involving any part of the biliary tree	Multifocal stricturing and beading, usually involving both the intrahepatic and extrahepatic biliary system
Compatible clinical and biochemical findings (for longer than 6 mo)	Cholestatic symptoms, history of inflammatory bowel disease
	Twofold to threefold increase in serum alkaline phosphatase levels
Exclusion of identifiable causes of secondary sclerosing cholangitis	AIDS cholangiopathy
	Bile duct neoplasm (unless diagnosis of PSC previously established)
	Biliary tract surgery, trauma
	Choledocholithiasis
	Congenital abnormalities of biliary tract
	Caustic sclerosing cholangitis
	Ischemic stricturing of bile ducts
	Toxicity or stricturing of bile ducts related to intra-arterial infusion of floxuridine