metabolic bone disease

metabolic bone disease

Any defect in bone absorption or deposition that alters the PTH/calcium-phosphate/vitamin D axis, often with increased bone fragility.
 
Aetiology
• Acquired—Fibrous dysplasia, Langerhans cell histiocytosis/histiocytosis X, acromegaly, corticosteroid therapy, heparin, hyperparathyroidism, hyperthyroidism, rickets, immobilisation syndrome, bone metastases, metabolic disease.
• Congenital—Ehlers-Danlos syndrome, homocystinuria, hypophosphatasia, Marfan syndrome, osteogenesis imperfecta, osteoporosis, Paget’s disease of bone (osteitis deformans).
 
Diagnostic workup
Measure Ca2+, PO4–, PTH, other hormones, bone biopsy, tetracycline test.

metabolic bone disease

Any defect in bone absorption or deposition that alters the PTH/calcium-phosphate/vitamin D axis, often with ↑ bone fragility Etiology Fibrous dysplasia, Langerhans' cell histiocytosis/histiocytosis X, acromegaly, corticosteroid therapy, heparin, hyperparathyroidism, hyperthyroidism, rickets, immobilization syndrome, bone metastases, metabolic disease, congenital–Ehlers-Danlos syndrome, homocystinuria, hypophosphatasia, Marfan syndrome, osteogenesis imperfecta, osteoporosis, Paget's disease of bone–osteitis deformans Diagnostic workup Measure Ca2+, PO₄–, PTH, other hormones, bone biopsy, tetracycline test