Table 2.

International consensus diagnostic criteria for type 1 autoimmune pancreatitis

	Diagnosis of type 1 AIP
Diagnosis	Cardinal feature	Imaging evidence	Collateral evidence
Definitive type 1	Histology	Typical/inderminate	Confirmed LPSP
	Imaging	Typical Inderminate	Any level 1/2 ≥ 2 level 1
	Steroid response	Indeterminate	Level 1 S/OOI and Rt OR Level 1 D and level 2 S/OOI/H and Rt
Probable type 1		Indeterminate	Level 2 S/OOI/H and Rt

LPSP: Lymphoplasmacytic sclerosing pancreatitis; AIP: Autoimmune pancreatitis; S: Serology; OOI: Other organ involvement; Rt: Response to steroid therapy; H: Histology