The Utility of Serum IgG4 Concentrations as a Biomarker

Table 1

IgG4 concentrations, age and complications of more than 3 extrapancreatic lesions in patients with autoimmune pancreatitis and major extrapancreatic lesions.

	𝑛 (male/female)	Age, yr Median  (range)	IgG4, mg/dL Median  (range)	Complications of more than 3 extrapancreatic lesions, 𝑛 (%)
Autoimmune pancreatitis	92 (72/20)	66 (38–85)	545 (4–2970)	11(12%)
Mikulicz’s disease	41 (31/10)	65 (43–82)	697 (18–2970)	13 (32%)
Sclerosing cholangitis	71 (53/18)	67 (38–84)	500 (4–2970)	13 (18%)
Retroperitoneal fibrosis	27 (23/4)	66 (50–80)	1110 (247–2970)	12 (44%)
Kidney lesion	18 (14/4)	67 (56–82)	1313 (156–2970)	9 (50%)