Product name:Human Chromogranin A ELISA Kit
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Chromogranin A (CgA) is a 49 KD glycoprotein. Elevated levels of CgA are used to differentiate between neuroendocrine and non-neuroendocrine tumors. About 50% of neuroendocrine tumors have elevated concentration of CgA. Serum CgA is most frequently elevated in gastrinoma (100%), pheochromocytoma (89%), carcinoid tumors (80%), nonfunctioning tumors of the endocrine pancreas (69%) and medullary carcinoma of the thyroid (50%). Only 7% of control subjects have elevated CgA and only 2% have extremely elevated serum CgA (>300 ng/ml).