Chromogranin A, Serum (Sendout)
General Information
- Lab Name
- Chromogranin A
- Lab Code
- RCGA
- Epic Name
- Chromogranin A (Sendout)
- External Test Id
- CGAK
- Description
Useful for:
- Follow-up or surveillance of patients with known or treated carcinoid tumors
- An adjunct in the diagnosis of carcinoid tumors
- An adjunct in the diagnosis of other neuroendocrine tumors, including pheochromocytomas, medullary thyroid carcinomas, functioning and nonfunctioning islet cell and gastrointestinal amine precursor uptake and decarboxylation tumors, and pituitary adenomas
- A possible adjunct in outcome prediction and follow-up in advanced prostate cancer
Patient Preparation: Proton pump inhibitor drugs should be discontinued for at least 2 weeks before collection.
- References
- Mayo Clinical & Interpretive Information: Chromogranin A, Serum
- Synonyms
- GCAK
- Components
Interpretation
- Method
Immunofluorescent Assay (IFA)
- Reference Range
-
Units: ng/mL
Female Male Age Range Age Range 0- <93 0- <93 Effective date: 10/10/2012
- Interferences and Limitations
Note: Impaired renal or hepatic function or treatment with proton pump inhibitors may result in artifactual elevation of Chromogranin A.
Ordering & Collection
- Specimen Type
- Serum
- Collection
-
3 mL blood in RED TOP tube or GOLD TOP SST
- Handling Instructions
Outside Laboratories: Centrifuge sample and transfer serum to a separate plastic vial. Freeze serum at -20°C.
- Note: Do not submit serum in original collection tube.
Stability: Frozen (preferred): 90 days; Refrigerated: 48 hours; Ambient: 48 hours.
Reject Due To: Gross hemolysis. Gross lipemia and gross icterus are acceptable.
- Quantity
-
Requested: 0.5 mL serum
Minimum: 0.2 mL serum
Processing
- Receiving Instructions
Centrifuge sample and transfer serum to a separate plastic vial, leaving room at the top for expansion. Freeze serum at -20°C.
- Note: Do not submit serum in original SST collection tube.
Sendouts:
- Order Mayo Test: CGAK.
- Interfaced: Yes [Interface: 601; Department: MAFZ]
Stability: Frozen (preferred): 90 days; Refrigerated: 48 hours; Ambient: 48 hours.
Reject Due To: Gross hemolysis. Gross lipemia and gross icterus are acceptable.
- Misc Sendout
Performance
- Lab Department
- Sendouts Mayo Lab (FZ)(MAFZ)
- Frequency
- Performed: Monday through Saturday. Report Available: 1-3 days from sample receipt at Mayo Clinic Labs.
- Available STAT?
- No
- Performing Location(s)
-
Sendout Mayo Clinic Laboratories (Superior Drive)
800-533-17103050 Superior Drive NW
Rochester, MN 55901
Billing & Coding
- CPT Codes
- 86316
- LOINC
- 9811-1
- Interfaced Order Code
- UOW1912
- Interfaced Result Code
- UOW1912