Interleukin-2 Soluble Receptor α
Also known as: IL-2 sRα
Use
This test is used for the measurement of Interleukin-2 Soluble Receptor α (sIL-2Rα) levels in serum.
Special Instructions
The sIL-2Rα test is part of a diagnostic process where levels exceeding 10,000 U/mL are particularly associated with specific conditions like advanced neoplasms. Accurate measurement requires the serum to be frozen immediately after collection and maintained frozen until testing to avoid delays in result processing.
Limitations
The sIL-2Rα test was developed by Labcorp and has not been cleared or approved by the FDA. It should be used in conjunction with other clinical criteria for a definitive diagnosis, as it represents only one of several markers needed to confirm certain medical conditions. Variability exists in sIL-2Rα levels due to overlaps with other inflammatory disorders, which may confound interpretations. Extremely elevated levels of sIL-2Rα are often seen in severe conditions like adult T-cell lymphoma/leukemia, but should be interpreted in context with other diagnostic information.
Methodology
Immunoassay (CLIA)
Biomarkers
LOINC Codes
- 44422-4
- 44422-4
Result Turnaround Time
3-6 days
Related Documents
For more information, please review the documents below
Specimen
Serum
Volume
0.5 mL
Minimum Volume
0.3 mL
Container
Red-top tube or gel-barrier tube
Collection Instructions
Transfer the serum into a Labcorp PP transpak frozen purple tube with screw cap (Labcorp No. 49482). Freeze immediately and maintain frozen until tested.
Storage Instructions
Freeze.
Causes for Rejection
Thawed specimen
Stability Requirements
| Temperature | Period |
|---|---|
| Frozen | 14 days |