Diagnosis of IgG4-related sclerosing cholangitis

Table 1 Etiology of secondary sclerosing cholangitis

Congenital	Caroli’s disease
	Cystic fibrosis
Chronic obstruction	Choledocholithiasis
	Biliary stricutures (secondary to surgical trauma, choronic pancreatitis)
	Anastomotic stricutures in liver graft
	Neoplasms (benign, malignant, metastatic)
Infectious	Bacterial cholangitis
	Recurrent pyogenic cholangitis
	Parasitic infection (cryptosporidiosis, microsporidiosis)
	Cytomegalovirus infection
Toxic	Accidental alcohol, formaldehyde, hypertonic saline instillation in the bile ducts
Immunologic	Eosinophilic cholangitis
	Acquired immunodeficiency
Ischemic	Vascular trauma
	Post-traumatic sclerosing cholangitis
	Post-transplantation hepatic artery thrombosis
	Hepatic allograft rejection (acute, chronic)
	Intra-arterial, chemotherapy-related injury
	Transcatheter arterial embolization therapy
Infiltrative disorders	Systemic vasculitis
	Amyloidosis
	Radiation injury
	Sarcoidosis
	Systemic mastocytosis
	Hypereosinophilic syndrome
	Hodgkin’s disease