Pediatric Hypercalcemia Follow-up
- Author: Ilene A Claudius, MD; Chief Editor: Stephen Kemp, MD, PhD more...
Further Inpatient Care
- Admit any patient requiring treatment for hypercalcemia.
- Continue the previously mentioned medications as needed.
- Continue an appropriate workup for the etiology of hypercalcemia.
- For neonates, specifically, Oski recommends 5% dextrose (D5) in one-half isotonic sodium chloride solution with 30 mEq/L potassium chloride at 2 times the maintenance dose along with 2-3 mg/kg/d furosemide and adequate phosphate supplementation to maintain normal levels.[10] Strongly consider surgical correction of primary hyperparathyroidism.
Further Outpatient Care
- Daily calcium intake should be limited, and restriction of vitamin D (sunlight, dairy) may be warranted in certain disorders.
Inpatient & Outpatient Medications
- Long-term therapy can begin while the patient is in the hospital and continue following discharge.
- Corticosteroids are helpful in certain disorders, particularly malignancy-associated hypercalcemia, granulomatous disease, or vitamin D ingestion; and they can be given either IV or orally as prednisone in doses of 40-60 mg/m2/d or 1.5-2 mg/kg/d to inhibit osteoclast action and decrease intestinal calcium absorption.
- Aminohydroxypropylidene (APD) can induce remissions of malignancy-associated hypercalcemia.
- If serum phosphate is low, intravenous (IV) phosphorus is no longer recommended because of the risk of intravascular precipitation with calcium; however, oral phosphate supplementation is recommended because this binds calcium in the intestine and diminishes calcium absorption. The dose is 1-3 g/d for an adult-sized person. Phosphate is contraindicated in renal failure and requires 2-3 days before it becomes effective.
- Bisphosphonates may also be continued as outpatient medications. One should consider alendronate as an oral preparation. However, note that no pediatric experience is noted.
- Indocin may be of some use in certain disorders that lead to hypercalcemia.
Transfer
- As in any patient, transfer is acceptable when patient is stable or when a higher level of care is required. However, consider the possibility of coma or cardiovascular collapse in a patient with an excessively high calcium level. Begin close observation/therapy before transfer.
Deterrence/Prevention
- Carefully monitor patients with risk factors for hypercalcemia, such as known malignancy, thiazide diuretic use, total parenteral nutrition, retinoid use for acne, or lithium use.
- Counsel patients to consume adequate phosphate and to avoid excessive calcium-containing antacids, vitamin D, and herbal preparations with vitamin A.
Complications
- Primarily ectopic calcifications may occur (see Physical).
Prognosis
- Hypercalcemia is frequently noted during laboratory testing while the patient is asymptomatic or mildly symptomatic. Prognosis depends on the underlying disorder.
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| Laboratory Test | Reference Range | Normal Response to Increased Calcium |
| Serum calcium | 8.5-10.2 mg/dL | NA |
| Ionized calcium | 1-1.3 mmol/L | NA |
| PTH (intact) | 10-55 pg/mL* | Decrease |
| Serum phosphate | Age-dependent | Increase |
| 1,25-dihydroxyvitamin D | 36-108 pmol/L | Decrease |
| Alkaline phosphatase | 68-217 U/L | Normal |
| Urine calcium | 4 mg/kg/d | Increase |
| Urine Ca/Cr ratio | See note† | Increase |
| Urine cAMP‡ | < 5 mol | Decrease |
| *Note that 1 mmol/L equals 4 mg/dL. †In infants younger than 7 months, the reference range is less than 0.86; in infants aged 7-18 months, the reference range is less than 0.6. By age 6-7 years, the adult reference range of less than 0.21 is reached.‡The urine cAMP level generally parallels the PTH level. | ||
| Condition | Serum Phosphorus | Serum Alkaline Phosphatase | Urine Calcium | Urine Phosphate | PTH |
| Hyperparathyroidism | Low | Normal-high | High* | High | High |
| Vitamin D excess | Normal-high | Low | High | High | |
| Malignancy | Often low | High † | Variable | High | |
| Granulomatous disease | Normal-high | Normal-high | High | Normal | |
| Milk alkali syndrome | Normal-high | Normal | Normal | Normal | |
| FHH | Normal or low | Normal | Low (< 200mg/d) | Normal | Low |
| *67% of the time † Except hematologic malignancies, in which alkaline phosphatase is normal | |||||

