Note that hyperpigmentation of the skin and gingiva was a physical finding in this patient. Is this clinical manifestation more characteristic of ACTH-dependent or ACTH-independent Cushing syndrome?...

Note that hyperpigmentation of the skin and gingiva was a physical finding in this patient. Is this clinical manifestation more characteristic of ACTH-dependent or ACTH-independent Cushing syndrome?

Which imaging techniques might be critical to establishing a specific cause of hypercortisolism in this patient?