14.3.3 eta Protein, Serum
Test Mnemonic
1433P
CPT Codes
- 83520 - QTY (1)
LOINC ®
75880-5
Includes
- 14.3.3 ETA, Rheum. Arthritis
Performing Laboratory
LabCorp
Specimen Requirements
| Volume | Type | Container | Collect Temperature | Transport Temperature | Special Instructions |
|---|---|---|---|---|---|
| 1 mL | Serum | No additive (Red) | Frozen | Allow specimen to clot completely at room temperature. Separate serum from cells ASAP or within 45 minutes of collection. Transfer serum to standard aliquot tube. |
Alternate Specimen Requirements
| Volume | Type | Container | Collect Temperature | Transport Temperature | Special Instructions |
|---|---|---|---|---|---|
| 1 mL | Serum | SST (Gold) | Frozen | Allow specimen to clot completely at room temperature. Separate serum from cells ASAP or within 45 minutes of collection. Transfer serum to standard aliquot tube. |
Minimum Specimen Requirements
| Volume | Type | Container | Collect Temperature | Transport Temperature | Special Instructions |
|---|---|---|---|---|---|
| 0.5 mL |
Stability
| Environmental Condition | Description |
|---|---|
| Refrigerated | 3 days |
| Ambient | 3 days |
| Frozen | 7 days (stable 6 freeze/thaw cycles) |
Days Performed
Varies
Turnaround Time
7 - 13 days
Methodology
| Name | Description |
|---|---|
| Enzyme-Linked Immunosorbent Assay (ELISA) |
Reference Range
| 14.3.3 eta PROTEIN | |||||
|---|---|---|---|---|---|
| Sex | Age From | Age To | Type | Range | Range Unit |
| Normal | <0.2 | ng/mL |
Special Info
Hemolyzed or lipemic specimens will be rejected.
Clinical Info
14-3-3 eta protein is a joint-derived, proinflammatory mediator that is implicated in the joint erosion process and pathogenesis of RA. Serum 14-3-3 eta is elevated in both early and established RA.