title: Hemodialysis patients with a unique mineralizing defect unresponsive to 1,25-dihydroxycholecalciferol. Dialysis osteomalacic syndrome.
abstract: 5 patients are described who developed severe osteomalacia with spontaneous fractures after 2-4 years on dialysis. Phosphate control, vitamin D2 therapy and parathyroidectomy were ineffective. These individuals showed a hypercalcemic tendency but little histologic or radiographic evidence of osteitis fibrosa. After parathyroidectomy, the hypercalcemic tendency remained and bone biopsy revealed gross osteomalacia. A 6- to 12-month therapeutic trial with 1,25-dihydroxycholecalciferol (1,25[OH]2D3) in 3 did not arrest skeletal deterioration. 4 subsequently developed dialysis encephalopathy. These patients appear to have a unique mineralizing defect unresponsive to 1,25(OH)2D3. This "dialysis osteomalacic syndrome" may result from toxic substances associated with uremia or the hemodialysis regimen.
mesh_terms: D000328:Adult; D000469:Alkaline Phosphatase / Q000097:blood; D001847:Bone Diseases / Q000209:etiology* / Q000503:physiopathology; D002118:Calcium / Q000097:blood; D002986:Clinical Trials as Topic; D004100:Dihydroxycholecalciferols / Q000627:therapeutic use*; D004872:Ergocalciferols / Q000627:therapeutic use; D005260:Female; D006801:Humans; D006887:Hydroxycholecalciferols / Q000627:therapeutic use*; D007676:Kidney Failure, Chronic / Q000097:blood / Q000150:complications / Q000628:therapy*; D008297:Male; D008875:Middle Aged; D010280:Parathyroid Glands / Q000601:surgery; D010281:Parathyroid Hormone / Q000097:blood; D006435:Renal Dialysis
chemical_list: D004100:Dihydroxycholecalciferols; D004872:Ergocalciferols; D006887:Hydroxycholecalciferols; D010281:Parathyroid Hormone; D000469:Alkaline Phosphatase; D002118:Calcium