Table 1 Summary of the clinical and laboratory investigations follow up

Age (months)

18

20

22

26

29

34

40

46

51

54

57

Weight (kg)

6.2

6.5

6.5

8.2

8.6

7.9

8.9

8.6

9.4

9.9

10.9

Weight for age Z-score (SD)

−4.84

−4.84

−4.91

−3.80

−3.70

−4.56

−4.17

−4.67

−4.37

−4.05

−3.60

Length/height (cm)

62.5

64

65

68.5

71

72

72.5

74.5

76.5

Height for age Z-score (SD)

−6.18

−6.04

−6.04

−6.97

−6.91

−7.05

−7.24

−7.22

−7.12

Serum calcium (mmol) (NR 2.25–2.75)

2.63

2.65

2.26

2.38

2.51

2.48

2.42

2.31

2.46

2.08

Serum phosphorus (mmol) (NR 1.0–1.95)

1.58

0.78

1.5

1.49

1.28

0.85

0.77

1.13

0.76

1.2

1.12

Parathyroid hormone (pg/ml) (NR 15–65)

169.9

62.27

55

Alkaline phosphatase (U/L) (NR up to 300 IU/L)

539

417

403

376

637

499

307

240

319

434

400

Bicarbonate (HCO₃) (mmol) (NR 22–29)

22.6

23.0

22.0

Diagnosis

Hypophosphatemic rickets

H

H

H

H

H

H

FBS

FBS

FBS

FBS

Medication

Calcitriol oral phosphorus

X

X

X

X

X

X

Calcitriol oral phosphorus HCO₃

Y

Y

Y

Dietary therapy

Normal (N)

N

N

N

N

N

N

Galactose-restriction

G

G

G