Slipped capital femoral epiphysis as primary presentation in an adolescent with primary hyperparathyroidism due to ectopic mediastinal parathyroid adenoma.

Key Clinical Message: Ectopic mediastinal parathyroid adenoma causes primary hyperparathyroidism presenting as hypercalcemia. When children with hypercalcemia present with slipped capital femoral epiphysis, a detailed evaluation for hypercalcemia must be done before surgery.

Abstract: The association between slipped capital femoral epiphysis (SCFE) and hyperparathyroidism has been reported and is rare.