Table 1. Characteristics of the Patients and ALPL Gene Analysis.

From: High Prevalence of Nephrocalcinosis in Hypophosphatasia Patients with the ALPL c.1559del Gene Variant

No. Age Sex Complaint Fracture ALP
(normal range: 38-113) (U/L)
Ca
(normal range: 8.8-10.1) (mg/dL)
iCa
(normal range: 2.41-2.72) (mEq/L)
Urine Ca/creatinine (normal range: <0.1)
(g/g・Cre)
25 OH-vitamin D
(normal range: >20)
(ng/L)
Abdominal echo or CT BMI lumbar spine/femur (%) Genomic study (all heterozygous) Diagnosis
1 44 F None 0 30 9.4 n.d. n.d. 12.4 Normal image 96/91 c.1559del Carrier
2 62 M False aneurysm 1 23 9.7 n.d. n.d. n.d. Renal cyst (l) 129/90 c.613G>A Adult type
3 49 M Muscle pain, migraine arthralgia (knee joints) 0 19 9.9 2.92 2.9/27.16 n.d. Normal image 110/87 c.529G>A
c.1559del
Adult type
4 37 M Migraine arthralgia (hip joint) 1 29 9.5 n.d. n.d. n.d. Normal image 118/108 c.529G>A Adult type
5 61 F Kidney calcification 0 27 9.5 2.76 16.9/80.91 19.1 Renal cyst
calcification
92/76 c.1559del Adult type
6 53 M None 10 28 9.3 2.84 n.d. n.d. Renal cyst (r and l) 87/73 c.1171dup Pediatric type
7 30 F Muscle pain migraine arthralgia 1 33 9.6 2.69 n.d. 12.6 n.d. 85/90 c.529G>A Adult type
8 53 M None 3 29 9.5 2.61 7.2/110.83 20.9 Calcification 77/79 c.979T>C Adult type
9 59 M None 2 19 9.6 2.72 4.5/25.46 19.8 Renal cyst
kidney stones
81/85 c.1559del Adult type
10 56 M Hyperlipidemia, heart valve disease, enthesopathy 0 20 9.3 2.63 19/106.9 28.9 Calcification, kidney stones, hydronephrosis 140/105 c.1559del Adult type
11 54 F Hypoplasia of tooth enamel 2 36 9.8 2.79 2.4/29.09 48.6 Calcification 109/97 c.1559del Adult type
Reference (26) 0 M Short stature, respiratory failure, muscle weakness, no calcification of skull 0 12 10.4 Kidney stone Not done c.1559del/
c.1276G>A
Perinatal type
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