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CHROMOGRANIN A
Number 175
CPT Code 86316
Alias CHROMOGRANIN A
Specimen Container SST
Specimen Type Serum
Turn Around Time
Days Performed
Reference Range 0-5 nmol/L
Alternate Specimen Lavender top EDTA; Green top heparin tube
Volume 1 mL Serum
Stability Ambient
Stability Refrigerated
Stability Frozen
Patient Preparation
Values obtained with different assay methods should not be used interchangeably in serial testing.
Methodology
Enzyme-linked immunoabsorbent assay (ELISA)
Limitations
Chromogranin A levels can be elevated in patients with severe renal failure. Elevated leveles of CgA are also common in patients on treatment with proton pump inhibitors.
Rejection Criteria
Non-EDTA or nonheparinized plasma; frozen red-top tube; grossly hemolyzed specimen
Additional Instructions
Performing Laboratory Reference Laboratory
TagsCGA