Microbiology Which of the following statements about Cushing’s disease is true? A Serum adrenocoicotropin (ACTH) levels usually are low B Pituitary microadenoma usually is present C There is a high incidence of nonendocrine tumors D Nonsuppression of coisol production by the high-dose dexamethasone suppression test is a characteristic finding 💡 Explanation Which of the following statements about Cushing's disease is true? ✓ Correct Answer: B. Pituitary microadenoma usually is present