Calcium Unresponsive Hypocalcemic Tetany: Gitelman Syndrome with Hypocalcemia

Table 1

Investigations.

Parameter	Value	Reference range and units
Serum sodium	138	135–145 mEq/L
Serum potassium	2.5	3.5–5 mEq/L
Serum calcium	7.3	8.7–10.2 mg/dL
Serum phosphorus (inorganic)	3.0	2.5–4.3 mg/dL
Serum magnesium	1.0	1.5–2.3 mg/dL
Intact parathyroid hormone	35	15–65 pg/mL
25 OH Vitamin D	52.1	23–113 nmol/L
Plasma renin	7.2	0.2–1.6 ng/mL/hour
Serum aldosterone	172	30–160 pg/mL
24 hours urine
(i) volume	2000	mL/day
(ii) sodium	229	40–220 mmol/day
(iii) potassium	146	25–125 mmol/day
(iv) magnesium	168	70–130 mg/day
(v) calcium	205	420–560 mg/day
(vi) phosphorus	482	400–1300 mg/day
(vii) calcium/creatinine	0.13	<0.2 in GS, >0.2 in BS
(viii) protein	120	30–150 mg/day