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HelpTest Code IGD Immunoglobulin D (IgD), Serum
Reporting Name
Immunoglobulin D (IgD), SPerforming Laboratory
Mayo Clinic Laboratories in Rochester
Useful For
Providing information on the humoral immune status
Identifying an IgD monoclonal gammopathy
Method Name
Turbidimetry
Ordering Guidance
To distinguish between polyclonal and monoclonal IgD, order PEISO / Protein Electrophoresis and Isotype, Serum.
Specimen Required
Supplies: Sarstedt 5 mL Aliquot Tube (T914)
Patient Preparation: Fasting preferred but not required
Collection Container/Tube:
Preferred: Serum gel
Acceptable: Red top
Specimen Volume: 1 mL
Collection Instructions: Centrifuge and aliquot serum into plastic vial.
Specimen Type
SerumSpecimen Minimum Volume
0.5 mL
Specimen Stability Information
| Specimen Type | Temperature | Time | Special Container |
|---|---|---|---|
| Serum | Refrigerated (preferred) | 28 days | |
| Frozen | 28 days | ||
| Ambient | 21 days |
Reject Due To
| Gross hemolysis | OK |
| Gross lipemia | Reject |
| Gross icterus | OK |
| Heat-activated specimen | Reject |
Reference Values
≤10 mg/dL
Interpretation
The physiologic significance of serum IgD concentration is unclear and in many normal persons serum IgD is undetectable.
Increased concentrations may be due to polyclonal (reactive) or monoclonal plasma cell proliferative processes.
A monoclonal IgD protein is present in 1% of patients with myeloma. Monoclonal IgD proteins are often in low concentrations and do not have a quantifiable monoclonal protein on serum protein electrophoresis. However, the presence of an IgD monoclonal protein is almost always indicative of a malignant plasma cell disorder such as multiple myeloma or primary amyloidosis.
Day(s) Performed
Monday through Friday
Report Available
1 to 3 daysTest Classification
This test has been cleared, approved, or is exempt by the US Food and Drug Administration and is used per manufacturer's instructions. Performance characteristics were verified by Mayo Clinic in a manner consistent with CLIA requirements.CPT Code Information
82784
LOINC Code Information
| Test ID | Test Order Name | Order LOINC Value |
|---|---|---|
| IGD | Immunoglobulin D (IgD), S | 2460-4 |
| Result ID | Test Result Name | Result LOINC Value |
|---|---|---|
| IGD | Immunoglobulin D (IgD), S | 2460-4 |