chromogranin A
chromogranin A
A major protein in catecholamine storage vesicles (chromaffin granules) of the adrenal medulla, which is co-released therefrom with catecholamines by exocytosis.Abnormal expression
Increased in anterior pituitary adenoma, parathyroid carcinoma, medullary thyroid carcinoma, carcinoid tumour, pancreatic islet cell tumour, small cell lung carcinoma.
Ref range
10–50 ng/mL.