90% of hypercalcaemia is due to either malignancy or hyperparathyroid.
Severity: Adjusted Calcium (Ca)
- Severe: >3.5mmol/l – URGENT treatment (risk of dysrhythmia)
- Moderate: 3.0-3.5mmol/l – PROMPT treatment (maybe well tolerated if chromic)
- Mild: <3.0mmol/l – doesn’t require urgent treatment and often asymptomatic
