Hypercalcaemia referrals from primary care: a retrospective audit

Contact: Dr N Maghsoodi E-mail: negar.maghsoodi@nhs.net Primary Hyperparathyroidism (PHP) is the commonest cause of hypercalcaemia, with an annual incidence rate (AIR) of 4 /100,000 and peak age incidence of 50-60 years. King’s College Hospital (KCH) serves a population of around 500,000 of >18 years of age. A corrected calcium (cCa) ≥3.00 mmol/L is a critical phoning limit in our biochemistry laboratory.