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HelpTest Code CGAK Chromogranin A, Serum
Reporting Name
Chromogranin A, SUseful For
Aiding in monitoring disease progression during the course of disease and treatment in patients with gastroenteropancreatic neuroendocrine tumors (grade 1 and grade 2) when used in conjunction with other clinical methods
This test is not indicated for use as a stand-alone monitoring assay.
Performing Laboratory
Mayo Clinic Laboratories in Rochester
Specimen Type
SerumSpecimen Required
Patient Preparation: For at least 2 weeks before specimen collection, patient should stop taking proton pump inhibitor medications.
Supplies: Sarstedt Aliquot Tube, 5 mL (T914)
Collection Container/Tube:
Preferred: Serum gel
Acceptable: Red top
Submission Container/Tube: Plastic vial
Specimen Volume: 0.5 mL Serum
Collection Information: Centrifuge and aliquot serum into plastic vial. Do not submit in original tube.
Specimen Minimum Volume
Serum: 0.2 mL
Specimen Stability Information
| Specimen Type | Temperature | Time |
|---|---|---|
| Serum | Frozen (preferred) | 90 days |
| Ambient | 48 hours | |
| Refrigerated | 48 hours |
Reference Values
<93 ng/mL
Reference values apply to all ages.
CPT Code Information
86316
Report Available
1 to 3 daysReject Due To
| Gross hemolysis | Reject |
| Gross lipemia | OK |
| Gross icterus | OK |
Day(s) Performed
Monday through Saturday
Forms
If not ordering electronically, complete, print, and send 1 of the following forms with the specimen:
-General Request (T239)
-Oncology Test Request (T729)
Method Name
Immunofluorescent Assay (IFA)