<prompt> A patient with diabetic nephropathy developed secondary hyperparathyroidism. Hyperparathyroidism is seen in all of the following conditions, EXCEPT:OsteoporosisOsteomalaciaRicketsChronic renal failure  <response>: In chronic kidney disease, hyperphosphatemia and decreased renal production of 1,25-dihydroxycholecalciferol 1,252D3 initially produce a decrease in ionized calcium. The parathyroid glands are stimulated secondary hyperparathyroidism and may enlarge, becoming autonomous teiary hyperparathyroidism. In osteomalacia and rickets, hypocalcemia acts as stimulus to secondary hyperparathyroidism. Ref: Shoback D., Sellmeyer D. 2011. Chapter 8. Metabolic Bone Disease. In D.G. Gardner, D. Shoback Eds, Greenspans Basic Clinical Endocrinology, 9e. 