Secondary hyperparathyroidism is seen in all EXCEPT:: (A) Chronic renal failure, (B) Vitamin D deficiency, (C) Medullary carcinoid syndrome, (D) Adenoma
Answer is D. Adenoma REF: Harrison's 17' ed p. 2388 Causes of secondary hyperparathyroidism Chronic renal failure Malabsorption syndrome Vitamin D deficiency Medullary carcinoma thyroid