Medicine About Cushing syndrome, true is: A Low dose dexamethasone suppresses coicosone secretion B CA of adrenal is more common than adenoma C Pituitary adenoma size > 2 cm (usually) D Increased ACTH secretion is the commonest endogenous cause 💡 Explanation About Cushing syndrome, true is: ✓ Correct Answer: D. Increased ACTH secretion is the commonest endogenous cause