Table 1

 Biochemistry of the four cases

25(OH) vitamin D (nmol/l)Alkaline phosphatase (units/l)Calcium (mmol/l)Phosphate (mmol/l)Parathyroid hormone (ng/l)
Ref R: 15–100Ref R: 180–900Ref R: 2.0–2.6Ref R: 1.0–2.1Ref R: 11–35
Case 1Sample not available25912.050.74548
Case 2<1566521.620.67163
Case 32620902.261.27393
Case 41213942.441.32Not done