Table 2.

Current laboratory values of patient I-1 and affected son (II-2).

Test (reference ranges)	Patient			Son
	9/2010	4/2011 Fasting	7/2011 Fasting	4/2011 Fasting	7/2011 Fasting
Ca (8.5–10.5 mg/dL)	10.1	10.0	10.5	9.8	9.5
Phosphorus (2.6–4.5 mg/dL)	1.9	3.5	2.9	2.9	3.2
Magnesium (1.4–2.0 meq/L)	1.7	1.7	1.7	1.7	1.8
Vitamin D (> 32 ng/mL)	34	22	39		21
1,25 Vitamin D (18–78 pg/mL)	10		14	43.5	39
Albumin (3.3–5.0 g/dL)	4.3	4.2	4.4	4.8
Alkaline phosphatase (30–100 U/L)	108	78	79	103
Parathyroid hormone   (10–60 pg/mL)	30	30	21	42	47
FGF23 (< 180 RU/mL)	785		414		70
Creatinine (0.60–1.50 mg/dL)	1.14	1.0	0.99	0.8	0.82
Glucose (70–110 mg/dL)	143
Tubular reabsorption of phosphorus   (> 80%, calculated based on   creatinine)	47.4%	89.7%	84.2%.	89.0%	89.8%
T1-TSH (0.40–5.00 uU/mL)	3.66		5.03		2.30
Hemoglobin (12.0–16.0 g/dL)	12.7		13.0		13.9
Fe (30–160 µg/dL)			118		80
TIBC (230–404 µg/dL)			365		303
Ferritin (10–200 ng/mL)			29		71