Case Report
Asymptomatic Severe Hypocalcemia Secondary to Vitamin D Deficiency in an Elderly Patient
Table 1
Initial blood chemistry studies.
| Test (unit) | Value (normal range) |
| Serum calcium (mg/dL) | 5.2 (8–10.5) | Ionized calcium (mmol/L) | 0.79 (1.1–1.4) | BUN (mg/dL) | 16 (7–18) | Serum creatinine (mg/dL) | 1.4 (0.5–1.4) | Phosphorous (mg/dL) | 4.7 (3.0–4.5) | Albumin (mg/dL) | 3.4 (3.5–4.8) | Alkaline phosphatase (U/L) | 313 (20–70) | Serum iPTH (pg/dL) | 462 (14–72) | 25-hydroxyvitamin D (pg/dL) | 4 (10–55) |
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Blood urea nitrogen (BUN); intact parathyroid hormone (iPTH).
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