Vitamin D Deficiency
- high ALP
- low Ca++
- low PO4
Aetiology:
- dietary deficiency
- malabsorption
- pancreatic insufficiency
- post-gastrectomy
- malabsorption syndromes
- drugs - phenytoin
- renal - defective 1-hydroxylation
- vit-D-dependent rickets
- type 1 - autosomal recessive, defective 1-hydroxylation
- type 2 - defective response to 1,25-OH2-D3
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