Casandra
Casandra Test Code QD78322Version 1 (DRAFT)
Performing Lab
Chromogranin A, LC/MS/MS
Also known as: CgA
Clinical Use
Order TestUse
Chromogranin‑A (CgA) is an acidic glycoprotein expressed in the secretory granules of most normal and neoplastic neuroendocrine cell types and is released together with peptide hormones and biogenic amines([jdos.nicholsinstitute.com](https://jdos.nicholsinstitute.com/dos/questdemo/test/873508?utm_source=openai)).
Special Instructions
Not provided.
Limitations
Not provided.
Test Details
Methodology
Mass Spectrometry
Biomarkers
Chromogranin A
AnalyteQuantitation • Concentration / Level • Quantitative (Continuous) (e.g., copies/mL, % expression)
Result Turnaround Time
4-6 days
Related Documents
For more information, please review the documents below
Specimen Requirements
Specimen
Serum
Volume
1 mL
Minimum Volume
0.5 mL
Container
Red‑top tube (no gel)
Collection Instructions
Collect blood in a standard red‑top serum vacutainer tube. Allow blood to clot at room temperature. Centrifuge and separate the serum from the cells immediately. Do not store refrigerated.
Causes for Rejection
Gross hemolysis • Unspun red‑top (no gel) tubes • Serum separator tube (SST)
Stability Requirements
| Temperature | Period |
|---|---|
| Room Temperature | 7 days |
| Refrigerated | Unacceptable |
| Frozen | 31 days |