Hypercalcaemia in sarcoidosis co-existing with primary hyperparathyroidism. A case report

Patients presenting with hypercalcaemia caused by the co-existence of sarcoidosis and primary hyperparathyroidism may present a diagnostic problem. Tests for sarcoid activity, together with the cortisone suppression test and an estimation of the immunoreactive parathyroid hormone level are all necessary to differentiate between those conditions.