The differentiating feature b/w Ectopic ACTH secretion and Cushing syndrome is -: (A) Hypokalemic alkalosis, (B) Clinical features of cushing syndrome, (C) Hyperpigmentation, (D) Hypeension
Answer is A. ectopic ACTH has no typical Cushing's signs & symptoms and hypokalemic alkalosis is the predominant manifestation ( Harrison 17 pg 2255)