The rise in basal ACTH levels during ketoconazole treatment in CD could be because of the activation of normal corticotrophs, which were earlier suppressed by hypercortisolism. The enhanced ACTH responses to ghrelin after ketoconazole in CD could also be due to activation of the hypothalamic-pituitary-adrenal axis and/or to an increase in GHS-receptors expression in the corticotroph adenoma, consequent to reductions in circulating glucocorticoids.
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