Renal osteodystrophy is a common finding in patients with renal insufficiency, with maximal intensity being found in hemodialysis patients.Those patients lose their ability to excrete phosphate, produce calcitriol and maintain calcium balance. Left untreated, these abnormalities promote the development of secondary hyperparathyroidism. However, some treated patients develop bone abnormalities linked to oversuppression of bone turnover, identified with term(adynamic bone disease).