Table 4.

Preoperative findings and work-up in patients diagnosed with AIP after pancreatoduodenectomy: did they meet the diagnostic criteria?

No	Histology postop	Histology preop	Typical imaging (atypical)	IgG	IgG4	AAB	Other organ involvement	Steroid trial	Asian positivee	HISORt positive
5	AIP type 2	n.a.	No	n.a.	n.a.	n.a.	No	No	No	Possiblec
7	AIP type 1	n.a.	No (focal mass)	n.a.	n.a.	n.a.	Hypothyroidism	No	No	Possiblec
10	AIP type 2	n.a.	No	n.a.	n.a.	n.a.	No	No	No	Possiblec
15	AIP type 2	n.a.	No (focal mass)	11.8a	1.39a	n.a.	No	No	No	Nod
16	AIP type 1	n.a.	No (focal mass)	33.0a	13.6a	Negative	Retroperitoneal Fibrosis	No	No	Yes
19	AIC	n.a.	Biliary stricture	n.a.	n.a.	n.a.	No	No	No	Possiblec
23	AIP type2	Malignantb	No (diffuse enlargement no rim, focal mass)	8.6	0.05	n.a.	No	No	No	Nod

IgG normal <17.0 g/L, IgG4 nl <1.40 g/L. n.a. not available, AAB auto antibodies (RF, ANA)

^aPreoperative values, measured retrospectively, ^b cytology (EUS FNA), ^c if serology positive and/or suggestive pancreatogram, responsiveness to steroids would have confirmed diagnosis, ^d even if responsive to steroids, diagnostic criteria would not have been met, ^e none of the patients had adequate (mandatory) pancreatogram; patients 16 and 19 had double duct sign on ERCP with minimal contrast injection