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Table 1 Initial biochemical parameters of the infant and mother

From: A novel CaSR mutation presenting as a severe case of neonatal familial hypocalciuric hypercalcemia

Lab results Initial Lab Results
  Infant, 2 wks Infant’s mother
Ca {2.3-2.8 mmol/L}; (2.2-2.5 mmol/L) 3.08 2.33
Phos {1.45-2.16 mmol/L}; (0.87-1.45 mmol/L) 1.87 1.42
Mg (0.65-1.0 mmol/L) 1.05  
Cr {25.0-75.0 mol/L}; (41.6-83.3) 25.0 58.3
Alkaline Phosphatase {150–420 U/L}; (30–120 U/L) 364  
Calcium creatinine clearance ratio* 0.0004 0.0005
iPTH (1.0-6.5 pmol/L) 20.4 5.7
Vit D 25(OH) (80–250 nmol/L) 45.18  
Vit D 1,25(OH)2 (42–169 pmol/L) 421.2  
  1. Normal adult ranges are given in parenthesis. Normal ranges for infants up to 24 months are given in curly brackets where applicable.
  2. *CCCR – calcium creatinine clearance ratio = U-calcium/S-calcium/U-creatinine/S-creatinine; calculated with spot urine and serum indices. CCCR <0.02 considered hypocalciuric [9].