Source:http://linkedlifedata.com/resource/umls/id/C0202100
NCI: A measurement of the C (connecting) peptide of insulin in a biological specimen.,NCI: The determination of the amount of C-peptide present in a sample.,NCI: A test used to help diagnose a type of pancreatic tumor called an insulinoma. After fasting, the patient receives an injection of insulin and the level of C-peptide (a substance released with insulin by the pancreas) in the blood is measured. In patients who have an insulinoma, the level of C-peptide is higher than normal.