IgG4 Related Sclerosing Cholangitis

Table 2

Classification of IgG4 related sclerosing cholangitis (IgG4-SC), differential diagnosis, and investigations (modified from the study by Nakazawa et al. [32]).

	Cholangiogram	Differential diagnosis	Investigations
Type 1		PCa; CCa; CP	EUS-FNA; Endobiliary brushings; Endobiliary biopsies; Percutaneous biopsy
Type 2		PSC	Liver biopsy; Colonoscopy (i.e. look for concurrent IBD)
Type 3		CCa; GB cancer	EUS; Endobiliary biopsy; Percutaneous biopsy
Type 4