An Interesting Presentation of Hypercalcaemia in a Middle-Aged Male.

A 41-year-old male presented to the Emergency Department with hypercalcaemia and acute kidney injury. He initially presented with bilateral parotid swelling which was treated as mumps. This was later investigated for suspected Sjögren's syndrome, but further evaluation led to a diagnosis of sarcoidosis. Imaging confirmed extensive mediastinal and hilar lymphadenopathy, and a skin biopsy revealed non-caseating granulomas, confirming sarcoidosis. This case highlights the complexity of diagnosing hypercalcaemia and the importance of considering systemic granulomatous diseases like sarcoidosis in the differential diagnoses.