How are chromogranin A levels used for the diagnosis of pheochromocytoma?

Updated: Jul 20, 2020
  • Author: Michael A Blake, MBBCh, MRCPI, FRCR; Chief Editor: George T Griffing, MD  more...
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Chromogranin A is an acidic monomeric protein that is stored with and secreted with catecholamines. Plasma levels of chromogranin A reportedly are 83% sensitive and 96% specific for identifying a pheochromocytoma. Chromogranin A levels are sometimes used to detect recurrent pheochromocytomas.

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