Glomerular Basement Membrane IgG Ab, IFA
Test Mnemonic
GBMG
CPT Codes
- 86255 - QTY (1)
LOINC ®
29994-1
Aliases
- Anti-GBM Antibody IgG
Includes
- Glomerular Basement Membrane Ab IgG (IFA)
Performing Laboratory
ARUP
Specimen Requirements
| Volume | Type | Container | Collect Temperature | Transport Temperature | Special Instructions |
|---|---|---|---|---|---|
| 1 mL | Serum | SST (Gold) | Refrigerated | Separate serum from cells ASAP. |
Minimum Specimen Requirements
| Volume | Type | Container | Collect Temperature | Transport Temperature | Special Instructions |
|---|---|---|---|---|---|
| 0.5 mL |
Stability
| Environmental Condition | Description |
|---|---|
| Ambient | After separation from cells: 2 days |
| Refrigerated | After separation from cells: 2 weeks |
| Frozen | After separation from cells: 1 year |
Days Performed
Mon - Fri
Turnaround Time
6 - 7 days
Methodology
| Name | Description |
|---|---|
| Microscopy | |
| Indirect Immunofluorescence Assay (IFA) |
Reference Range
Special Info
Separate serum from cells ASAP.
Clinical Info
Goodpasture's syndrome. The anti-GBM IFA methodology has been shown to be less specific than the semi-quantitative tests for circulating antibodies. The determination of a positive test result is based upon a diffuse "linear" staining pattern as viewed through a fluorescent microscope. All positive results should be confirmed by a semi-quantitative test and/or renal biopsy.
Clinical Limitation
n/a
Clinical Reference
n/a