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Renal osteodystrophy is a bone pathology, characterized by defective mineralization, that results from kidney disease. Renal osteodystrophy comes in two different forms, high bone turnover and low bone turnover.
Renal osteodystrophy may exhibit no symptoms; if it does show symptoms, they include:
Renal osteodystrophy is usually diagnosed after treatment for end-stage renal disease begins. Blood tests will indicate decreased calcium and calcitriol and increased phosphate and parathyroid hormone. X-rays will also show bone features of renal osteodystropy (chondrocalcinosis at the knees and pubic symphysis, osteopenia and bone fractures) but may be difficult to differentiate from other conditions.
Renal osteodystrophy is thought to be the result of hyperparathyroidism secondary to hyperphosphatemia combined with hypocalcaemia, both of which are due to decreased excretion of phosphate by the damaged kidney. Low activated vitamin D3 levels are a result of the damaged kidneys’ inability to convert vitamin D3 into its active form, calcitriol, and result in further hypocalcaemia and hyperphosphatemia.
To confirm diagnosis, renal osteodystrophy must be distinguished from:
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