Overview
Look For
- Serum phosphate >1.5 mmol/L.
Aetiology
Causes of Hyperphosphataemia
Excessive Phosphate Intake / Production
- Phosphate replacement
- Rhabdomyolysis
- Tumour lysis syndrome
Reduced Excretion
- Renal failure - acute or chronic
- Hypoparathyroidism
- Vitamin D deficiency
- Bisphosphonates
- Osteoblastic metastases
Clinical Features
Signs and Symptoms
Generally asymptomatic unless severe.- Hypocalcaemia - hyperreflexia, tetany, seizures, heart failure
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