Lupus Site - a guide for lupus patients and their families

Normal Range = IgA: 78-367 mg/dL. IgG: 583-1761 mg/dL. IgM: 52-335 mg/dL.

 IgG increased in- Polyclonal: Autoimmune diseases (eg, SLE, RA), sarcoidosis, chronic or recurrent infections.

IgA increased in- Polyclonal: Chronic liver disease, chronic infections (especially of the GI and respiratory tracts).

IgG decreased in- Immunosuppressive therapy.

IgM decreased in- Immunosuppresive therapy.