FIGURE 1.

Establishing the cause of ACTH‐dependent Cushing's syndrome and management (adapted from 22 ). Abbreviations: ACTH, adrenocorticotropic hormone; LDDST, low dose dexamethasone suppression test; CRH, corticotropin releasing hormone; MRI, magnetic resonance imaging; BIPSS, bilateral inferior petrosal sinus sampling; CT, computed tomography; SCLC, small cell lung cancer