A woman suffers from hyperglycemia, abdominal obesity, and skeletal muscle wasting. Lab tests reveal low circulating levels of ACTH. Which one of the following is the most likely cause of her symptoms? a hormone-secreting tumor of the renal cortex long-term treatment with endogenous glucocorticoids hypocortisolism due to an adrenal tumor that oversecretes cortisol hypercortisolism due to autoimmune activation of cells in the adrenal cortex hypercortisolism due to an ACTH-secreting tumor of the posterior pituitary
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