Chromogranin A
| Label Mnemonic: | CGA |
| Epic code: | LAB2862 |
| Downtime form: | A-1a Doctor/Provider Orders - Pathology Core and Specialty Care Nursery |
Commercial Mailout Laboratory
6240-8 RCP
356-8593
6240-8 RCP
356-8593
Specimen(s):
Serum
Collection Medium:
 |
| Red top tube 5 mL (Clot Activator) |
Minimum:
Preferred Minimum: 1 mL serum
Absolute Minimum: 0.5 mL serum
Allow serum specimen to clot completely at room temperature.
Absolute Minimum: 0.5 mL serum
Allow serum specimen to clot completely at room temperature.
Rejection Criteria:
Plasma
Turn Around
Time:
1-5 days upon receipt at reference laboratory
Reference Range:
0-103 ng/mL
Interpretive Data:
This test is performed using the BRAHMS CGA II Kryptor kit. Results obtained with different methods or kits cannot be used interchangeably. Results cannot be interpreted as absolute evidence of the presence or absence of malignant disease.
Nontumor-related elevations of Chromogranin A can be observed in gastrointestinal, cardiovascular, and renal disorders, as well as with proton pump inhibitor (PPI) therapy. It is recommended to stop PPI treatment for at least two weeks prior to testing. Moderate H2-receptor antagonist therapy does not lead to significant elevations of Chromogranin A.
Nontumor-related elevations of Chromogranin A can be observed in gastrointestinal, cardiovascular, and renal disorders, as well as with proton pump inhibitor (PPI) therapy. It is recommended to stop PPI treatment for at least two weeks prior to testing. Moderate H2-receptor antagonist therapy does not lead to significant elevations of Chromogranin A.
Methodology:
Immunofluorescence
CPT Code:
86316