Commonest cause of Cushing syndrome is: (A) Adrenal adenoma, (B) Carcinoma, (C) Atrophy, (D) Hyperplasia
Answer is D. MC cause of Cushing's syndrome is iatrogenic exogenous administration of steroids. MC endogenous cause of Cushing's syndrome is bilateral adrenal hyperplasia secondary to hypersecretion of ACTH from pituitary or from an ectopic non-pituitary source