Secondary hyperparathyroidism are seen in all except -
High-Yield Explanation
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