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Chromogranin A (CgA):

This test measures the amount of Chromogranin A (CgA) in the blood. CgA is a protein found in and released from neuroendocrine cells. Neuroendocrine cells, and the endocrin system glands that they are found in, can give rise to a variety of tumors, both benigen and malignant. They include carcinoid tumors, pheochromocytomas, insulinomas, small cell lung cancers, neuroblastomas, and other neuroendocrine tumors. Many of these tumors release large quantities of hormones, such as serotonin, catecholamines, or insulin, continuously or intermittently, causing symptoms characteristic for that tumor. However, some neuroendocrine tumors do not release the expected hormones. In either case, neuroendocrine tumors are frequently associated with increased concentrations of CgA.

test used in
A test is used as a tumor marker

هذا الاختبار يقيس نسبة ال
CgA
فى الدم وهو بروتين يوجد بالخلايا ويفرز من الغدة العصبية الصماء وحدوث اضطراب فى هذه الغدة قد يؤدى الى الاصابة بالاورام مثل سرطان الرئة والعديد من السرطانات

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