Most common cause of Cushing's syndrome is: (A) Exogenous coicosteroids, (B) Pituitary tumor, (C) Adrenal adenoma, (D) Adrenal carcinoma
Answer is A. Causes of Cushing Syndrome: - Exogenous : External supplementation of glucocoicoids - Most common cause - Endogenous : Pituitary adenoma Ectopic ACTH secretion - Small cell lung cancer; Medullary thyroid cancer etc Adrenal causes - Adrenal hyperplasia / adenoma/ cancer