Morphological aspects of small-duct cholangiopathies: A minireview

Table 1 Morphological classification of cholangiopathies

Pattern of biliary injury		Disease
Cholangitis	Neutrophilic	Infection, sterile
	Lymphocytic	PBC, GVHD, allograft rejection
	Pleomorphic	AIH, PBC, DILI
	Granulomatous	PBC, sarcoidosis, DILI
	Sclerosing	PSC, IgG4-sclerosing cholangitis, DILI
Bile duct loss and ductopenia		See Table 2
Ductal plate malformation		See Table 3
Neoplastic		BilIN, IPN, cholangiocarcinoma

PBC: Primary biliary cholangitis; GVHD: Graft-versus-host disease; AIH: Autoimmune hepatitis; DILI: Drug induced liver injury; PSC: Primary sclerosing cholangitis; BilIN: Biliary intraepithelial neoplasia; IPN: Intraductal papillary neoplasia.