Immunoglobulin G Subclass 4 details
What Immunoglobulin G Subclass 4 shows
IgG4 is one of four subclasses of IgG antibodies, normally present in only small amounts. Elevated IgG4 is associated with IgG4-related disease, a rare but increasingly recognized inflammatory condition in which IgG4-producing cells and elevated IgG4 antibodies cause tissue swelling and scarring in one or multiple organs — commonly the pancreas, bile ducts, salivary glands, or kidneys, among others. It's typically tested when this condition is suspected based on characteristic imaging findings or symptoms, and elevated levels support, but don't alone confirm, the diagnosis.
Tests that include Immunoglobulin G Subclass 4
This test measures immunoglobulin G4 antibodies. It is useful for evaluating sinopulmonary infections, asthma, immunotherapy hyposensitization, and allergies.
- Immunoglobulin G Subclass 4 A subclass of IgG antibodies. Elevated levels are associated with IgG4-related disease, a rare inflammatory condition that can affect multiple organs.
This test measures immunoglobulin G4 antibodies. It is useful for evaluating sinopulmonary infections, asthma, immunotherapy hyposensitization, and allergies.
- Immunoglobulin G Subclass 4 A subclass of IgG antibodies. Elevated levels are associated with IgG4-related disease, a rare inflammatory condition that can affect multiple organs.
Measurement of IgG subclasses may be helpful in the management and understanding of immunodeficiency diseases, hypersensitivity states, and conditions involving susceptibility to infection.
- Immunoglobulin G (IgG) Your most abundant antibody class, providing long-term immune memory against past infections. Low levels can point to an immune deficiency.
- Immunoglobulin G Subclass 1 Measures IgG1, the most abundant of the four IgG antibody subclasses, to help evaluate immune function in people with frequent or unusual infections.
- Immunoglobulin G Subclass 2 Measures IgG2, the IgG antibody subclass important for fighting bacteria with sugar coatings, to help evaluate immune function in people with recurrent infections.
- Immunoglobulin G Subclass 3 Measures IgG3, an IgG antibody subclass that is especially active against viruses and in activating the immune system, to help evaluate recurrent infections.
- Immunoglobulin G Subclass 4 A subclass of IgG antibodies. Elevated levels are associated with IgG4-related disease, a rare inflammatory condition that can affect multiple organs.
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