GHRL and congenital isolated adrenocorticotropic hormone deficiency: However, in a corticotropin-releasing hormone load test, response of adrenocorticotropic hormone and cortisol was poor after corticotropin-releasing hormone loading, and in growth hormone-releasing peptide 2 load test, adrenocorticotropic hormone response was poor, suggesting the presence of adrenocorticotropic hormone deficiency.