. 2012 Aug 7;18(29):3883–3888. doi: 10.3748/wjg.v18.i29.3883

Table 1.

Histological criteria for International Consensus Diagnostic Criteria

	Level 1	Level 2
Type 1 AIP
Histology of the pancreas	LPSP (core biopsy/resection)	LPSP (core biopsy)
Histology of the pancreas	At least 3 of the following:	Any 2 of the following:
	(1) Periductal lymphoplasmacytic infiltrate without granulocytic infiltration	(1) Periductal lymphoplasmacytic infiltrate without granulocytic infiltration
	(2) Obliterative phlebitis	(2) Obliterative phlebitis
	(3) Storiform fibrosis	(3) Storiform fibrosis
	(4) Abundant (> 10 cells/HPF) IgG4-positive cells	(4) Abundant (> 10 cells/HPF) IgG4-positive cells
Type 2 AIP
Histology of the pancreas (core biopsy/resection)	IDCP
Histology of the pancreas (core biopsy/resection)	Both of the following:	Both of the following:
	(1) GEL with or without granulocytic acinar inflammation (2) Absent or scant (0-10 cells/HPF) IgG4-positive cells	(1) Granulocytic and lymphoplasmacytic acinar infiltrate (2) Absent or scant (0-10 cells/HPF) IgG4-positive cells

AIP: Autoimmune pancreatitis; LPSP: Lymphoplasmacytic sclerosign pancreatitis; IDCP: Idiopathic duct-centric pancreatitis; GEL: Granulocytic infiltration of the duct wall; IgG4: Immunoglobulin G4; HPF: High power field.