Chromogranin A is an acidic 439 amino acid glycoprotein (48 kDa) originating from the chromaffin granules of most neuroendocrine cell types. In health, chromogranin A is released as a pro-hormone together with other peptide hormones in response to stimulation. Larger quantities of chromogranin A are produced by neuroendocrine derived tumours thus allowing it to be used as a tumour marker. Chromogranin A is the most commonly raised neuroendocrine tumour (NET) marker.
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|Precautions||Spin and separate within 8 hours. Store serum for up to four days refrigerated. Store frozen if longer term storage is required. Samples from referral laboratories can be posted at room temperature using 1st class post.|
|Minimum volume||1 mL|
|Reference range||<95 µg/L|
|Turnaround time||28 days|