2. • Form of metabolic bone disease
• seen in patients with chronic renal insufficiency
• characterized by bone mineralization deficiency due to electrolyte
and endocrine abnormalities.
7. High-turnover renal bone disease (high PTH
disease)
• chronically elevated phosphate leads to secondary hyperparathyroidism
• lowers serum Ca, stimulating PTH
• impairs renal 1α-hydroxylase, reducing 1,25(OH)2 vitamin D3 production
• directly stimultes PTH production
• decreased calcium, increased serum phosphate, increased alkaline
phosphate, increased parathyroid hormone
8. Low turnover renal bone disease (normal PTH
disease)
• normal levels of PTH with characteristic bone lesions
• deposition of aluminium into bone
• impairs PTH release from parathyroid gland
• disrupts mineralization
9. Presentation
• weakness
• bone pain
• pathological fracture (commonest complication)
• skeletal deformity
• symptoms of hypocalcemia