Secondary hyperparathyroidism are seen in all except -: (A) Rickets, (B) Osteomalacia, (C) Osteoporosis, (D) Renal failure
Answer is C. Primary -Singleadenoma(90%) Multipleadenomas(4%) Nodularhyperplasia(5%) Carcinoma(1%) Secondary -Chronicrenalfailure ,Malabsorption,Osteomalacia'and rickets Teiary DAVIDSONS PRINCIPLES AND PRACTICE OF MEDICINE 22ND EDITION PAGE NO-769