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Glomerular Basement Membrane Antibody, IgG by Multiplex Bead Assay and IFA
2008403
Ordering Recommendation

Preferred panel for detecting glomerular basement membrane (GBM) antibodies in suspected or established anti-GBM disease. If positive, may be useful for monitoring treatment response.

Mnemonic
GBM-G PAN
Methodology
Semi-Quantitative Multiplex Bead Assay/Qualitative Indirect Fluorescent Antibody
Performed
Mon-Fri
Reported
1-5 days
New York DOH Approval Status
This test is New York DOH approved.
Submit With Order
ARUP Consult®
Disease Topics
Specimen Required
Patient Preparation
 
Collect
Serum separator tube.  
Specimen Preparation
Separate serum from cells ASAP or within 2 hours of collection. Transfer 1 mL serum to an ARUP Standard Transport Tube. (Min: 0.3 mL)  
Storage/Transport Temperature
Refrigerated.  
Unacceptable Conditions
 
Remarks
 
Stability
After separation from cells: Ambient: 48 hours; Refrigerated: 2 weeks; Frozen: 1 year (avoid repeated freeze/thaw cycles)  
Reference Interval
Test NumberComponentsReference Interval
0051000Glomerular Basement Membrane Antibody, IgG by Multiplex Bead AssayNegative: 19 AU/mL or less
Equivocal: 20-25 AU/mL
Positive: 26 AU/mL or greater
0049191Glomerular Basement Membrane Antibody, IgG (IFA)Negative

Interpretive Data
When present, IgG antibody to glomerular basement membrane (GBM) antigen detected by either indirect fluorescent antibody (IFA) or multiplex bead assay helps support a diagnosis of Goodpasture syndrome. However, the combined result of both assays performed during initial evaluation improves the diagnostic sensitivity for disease. A positive result in one or both assays should be confirmed by renal biopsy.


Compliance Statement D: This test was developed and its performance characteristics determined by ARUP Laboratories. The U.S. Food and Drug Administration has not approved or cleared this test; however, FDA clearance or approval is not currently required for clinical use. The results are not intended to be used as the sole means for clinical diagnosis or patient management decisions.
Note
CPT Code(s)
83516; 86255
Components
Component Test Code*Component Chart NameLOINC
0049191GBM Antibody, IgG by IFA29994-1
0051000GBM Ab, IgG by Multiplex Bead Assay44446-3
* Component test codes cannot be used to order tests. The information provided here is not sufficient for interface builds; for a complete test mix, please click the sidebar link to access the Interface Map.
Aliases
  • Anti-GBM Antibody-IgG
  • Antiglomerular Basement Membrane Antibody-IgG
  • Basement Membrane Antibody
  • Basement Membrane, Glomerular Antibody
  • GBM Antibody
  • Glomerular Anti-Basement Membrane