NCIt definition : A synthetically-derived subunit of the endogenous peptide pituitary hormone adrenocorticotropic
hormone (ACTH). Consisting of the first 24 amino acids from the amino terminal of
ACTH, Cortrosyn is usually prepared for injection and intended for diagnostic and
not therapeutic use. Similar to endogenous ACTH, this agent stimulates the adrenal
secretion of specific adrenal steroids that can be measured in the plasma. (NCI04);