A Novel Variant in the Calcium-Sensing Receptor Associated with Familial Hypocalciuric Hypercalcemia and Low-to-Normal PTH

Table 1

Range of values displayed when numerous results are available.

Measure	Reference	Daughter	Mother
Calcium	8.4–10.2 mg/dL	10.1.–11.1	10.2–11.3
Ionized calcium	4.4–5.5 mg/dL	5.7	5.8–6.0
Creatinine	0.52–1.04 mg/dL	0.54–0.69	0.5–0.61
Chloride/phosphate ratio		33–41	35
Phosphorus	2.5–4.5 mg/dL	2.1–3.4	3.1–3.3
Magnesium	1.6–2.3 mg/dL	2.2–2.4	2.2
Intact PTH	10–65 pg/mL	13–24	12–42
25-OH vit D	Variable ng/dL	20–22	25–42
1,25-OH vit D	18–72 pg/mL	72–94	67–81
24 hour urine calcium (grams creatinine/24 h)		103 (1.27 g Cr),	84 (1 g Cr)
		105 (1.65 g Cr)	90 (1.02 g Cr)
Ca/Cr clearance ratio		0.004	0.004
PTH by dilution		24, 24 (1 : 2), 27 (1 : 4)
Midmolecule PTH	10–25 nLmeq/mL	11	10
ACE	9–67 U/L	34	38
Alk phos-bone specific	4.7–17.8 mcg/L	8.9
CTX	64–640 pg/mL	239

ACE, angiotensin converting enzyme; PPD, purified protein derivative; PTH, parathyroid hormone; CTX, collagen type 1 C-telopeptide.