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Hypercalcemia: A Review.

Marcella Donovan Walker1, Elizabeth Shane1

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|October 25, 2022
PubMed
Summary
This summary is machine-generated.

Hypercalcemia, often asymptomatic, can cause severe symptoms like confusion and coma. Primary hyperparathyroidism and malignancy are common causes, requiring tailored treatments from observation to bisphosphonates.

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Area of Science:

  • Endocrinology
  • Nephrology
  • Oncology

Background:

  • Hypercalcemia affects ~1% of the population, ranging from asymptomatic mild cases to severe presentations with neurological and systemic symptoms.
  • Primary hyperparathyroidism (PHPT) and malignancy account for ~90% of hypercalcemia cases, with other causes including granulomatous diseases, endocrinopathies, and certain medications.

Approach:

  • Differentiating PTH-dependent from PTH-independent causes using serum intact parathyroid hormone (PTH) levels is crucial for diagnosis.
  • Management strategies vary from observation for mild, asymptomatic PHPT to hydration and bisphosphonates for severe or symptomatic hypercalcemia.

Key Points:

  • Mild hypercalcemia is usually asymptomatic, while severe cases manifest with nausea, vomiting, dehydration, confusion, somnolence, and coma.
  • Serum intact PTH levels are key to distinguishing PHPT from other causes of hypercalcemia.
  • Treatment involves addressing the underlying cause, with options including parathyroidectomy, observation, hydration, bisphosphonates, denosumab, dialysis, and glucocorticoids.

Conclusions:

  • Effective management of hypercalcemia hinges on identifying and treating the specific underlying etiology.
  • Prognosis varies significantly, with asymptomatic PHPT generally having an excellent outlook, whereas hypercalcemia of malignancy is associated with poor survival.