Extent of Disease by Immunoglobulin G Immunoassay (Qualitative)

What This Test Measures

Immunoglobulin G (IgG) is the most common type of antibody in the body and is part of the immune response. In this context, the test uses an immunoassay technique to detect IgG in relation to an extent-of-disease assessment. Because it is qualitative, it focuses on whether the substance is detected, not on an exact quantity.

How the Test Is Used

Tests described as extent-of-disease are generally used to help understand how far a condition may have spread or how active it is. Your healthcare provider uses this information together with your history, symptoms, imaging, and other laboratory results to build a complete picture.

What the Results Mean

A qualitative immunoassay result is typically reported as detected, not detected, or inconclusive. A single result does not define a diagnosis on its own; your provider interprets it in the context of your overall health and other tests. Ask your care team to explain what your specific result means for you.

Limitations and Considerations

The abbreviated name for this test leaves some details, such as the exact specimen type and the specific disease being assessed, unclear from the slug alone. Results can be affected by timing, sample handling, and the particular assay used, so the ordering laboratory's information should be reviewed.