試題詳解

72 承上題，經低劑量 dexamethasone 壓抑測試其 urine cortisol 62.4 mcg/24 hours, plasma ACTH 4.2 pg/mL， 經高劑量 dexamethasone 壓抑測試其 urine cortisol 58.3 mcg/24 hours。何者為最可能診斷？
(A)Ectopic ACTH syndrome
(B)Cushing’s syndrome
(C)Cushing’s disease
(D)Factitious Cushing