Chromogranin A (a protein of 439-amino acids which is encoded on chromosome 14) is present in neuroendocrine cells throughout the body, including the neuroendocrine cells of the large and small intestine, adrenal medulla and pancreatic islets. It is an excellent marker for carcinoid tumors, pheo-chromocytomas, paragangliomas, and other neuro-endocrine tumors. Coexpression of chromogranin A and neuron specific enolase (NSE) is common in neuroendocrine neoplasms.
betagranin (N-terminal fragment of chromogranin A); catestatin; CgA; chromofungin; chromogranin A (parathyroid secretory protein 1); Chromogranin-A; pancreastatin; parathyroid secretory protein 1; Pituitary secretory protein I; SP-I
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