Type | Calcium | Phosphorus | Alkaline phosphatase | PTH | 25OHD | 1,25(OH)2D | Urine calcium | |
Calcipenic rickets | Vitamin D-deficient rickets | ↓ or N | ↓ or N | ↑ or ↑↑ | ↑ | ↓ | ↑ or N or ↓ | ↓ or N |
1-alpha-hydroxylase deficiency* | ↓ | ↓ or N | ↑↑ | ↑ | N | ↓ | ↓ | |
25-hydroxylase deficiency (variable severity) | ↓ or N | ↓ | ↑↑ | ↑ | ↓ | N | ↓ | |
Increased vitamin D catabolism | ↓ | ↓ | ↑↑ | ↑ | ↓ | ↓ | Presumed ↓ | |
Hereditary resistance to vitamin D¶ | ↓ | ↓ or N | ↑↑ | ↑ | N | ↑↑ | ↓ | |
Phosphopenic rickets | X-linked hypophosphatemia (and other FGF23-mediated hypophosphatemic disorders) | N | ↓↓ | ↑ | N or slightly ↑ | N | N or ↓ | ↓ |
Hereditary hypophosphatemic rickets with hypercalciuria | N | ↓ or ↓↓ | ↑ | N or ↓ | N | ↑ | ↑ | |
Nutritional phosphate deprivation | ↑ or N | ↓ or ↓↓ | ↑ or ↑↑ | ↓ or N | N | ↑ | ↑ or N |
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