Chromogranin A
Test Mnemonic
CHROMA
CPT Codes
- 86316 - QTY (1)
LOINC ®
9811-1
Aliases
- CgA
Performing Laboratory
Cleveland Clinic Laboratories
Specimen Requirements
| Volume | Type | Container | Collect Temperature | Transport Temperature | Special Instructions |
|---|---|---|---|---|---|
| 1 mL | Serum | SST (Gold) | Refrigerated |
Alternate Specimen Requirements
| Volume | Type | Container | Collect Temperature | Transport Temperature | Special Instructions |
|---|---|---|---|---|---|
| 1 mL | Serum | No additive (Red) |
Minimum Specimen Requirements
| Volume | Type | Container | Collect Temperature | Transport Temperature | Special Instructions |
|---|---|---|---|---|---|
| 0.5 mL |
Stability
| Environmental Condition | Description |
|---|---|
| Ambient | 1 day |
| Refrigerated | 7 days |
| Frozen | 14 days |
Days Performed
Mon, Thu
Turnaround Time
7 days
Methodology
| Name | Description |
|---|---|
| Enzyme-Linked Immunosorbent Assay (ELISA) |
Reference Range
| Chromogranin A | |||||
|---|---|---|---|---|---|
| Sex | Age From | Age To | Type | Range | Range Unit |
| Normal | <98 | ng/mL |
Special Info
Plasma is not acceptable. Grossly hemolyzed samples will be rejected. The Chromogranin A test was performed using the Cisbio CGA ELISA method. Results obtained with different assay methods or kits cannot be used interchangeably.
Clinical Info
Clinical Limitation
Samples displaying cloudiness, hemolysis, or containing fibrin may give inaccurate results. Chromogranin A is a calcium binding protein and its circulating levels are affected by the Ca++ concentration.