A spotlight on Chromogranin A
What is Chromogranin A? Chromogranin A (CgA) is an acidic protein released along with catecholamines from chromaffin cells and nerve terminals. This statement alone might explain why it's a good marker to use with Neuroendocrine Neoplasms. It is said to be a measure of tumour bulk. Depending on the test kit being used, you may also see test results for Chromogranin B (CgB) alongside CgA. CgB is said to be less affected by false positives and forms a useful adjunct to the more established chromogranin A measurement. The brand of test kit which includes CgB tends to be confined to…