IgG 4 is a blood test to see the increase in the level of levels of an immunoglobulin produced by the immune system. Autoimmune pancreatitis can be detected by this blood test.
This test is useful for the diagnosis of IgG4-related disease.
Specific tests may includeElevated levels of IgG4 are consistent with, but not diagnostic of, IgG4-related disease. 0-<5 months: < or =19.8 mg/dL
5-<9 months: < or =20.8 mg/dL
9-<15 months: < or =22.0 mg/dL
15-<24 months: < or =23.0 mg/dL
2-<4 years: 0.4-49.1 mg/dL
4-<7 years: 0.8-81.9 mg/dL
7-<10 years: 1.0-108.7 mg/dL
10-<13 years: 1.0-121.9 mg/dL
13-<16 years: 0.7-121.7 mg/dL
16-<18 years: 0.3-111.0 mg/dL > or =18 years: 2.4-121.0 mg/dL
