POMC and Cushing syndrome due to macronodular adrenal hyperplasia: Our adherence to a rigorous multidisciplinary diagnostic protocol, incorporating standardized biochemical testing (LDDST, HDDST), BIPSS with DDAVP stimulation (performed in 19/22), and high-resolution dynamic pituitary MRI, reflects current best practices for confirming ACTH-dependent Cushing’s syndrome and tumor localization.