What is the significance of ACTH stimulation test?

ACTH full name should be called adrenocorticotropin, ACTH excitation test significance lies in the following two aspects: 1, if suspected adrenocortical function decline, then can be diagnosed through ACTH excitation test, the test is best carried out in the morning, in order to prevent healthy people show false positive abnormal results. 2, ACTH stimulation test significance lies in the stimulation test can be used to identify the type of Cushing's syndrome, ACTH-dependent Cushing's disease or non-ACTH-dependent Cushing's syndrome. ACTH also has a circadian secretion law, 8 am is the highest, the lowest at night, Cushing's syndrome patients ACTH circadian rhythm is disappeared.