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Mediastinal, Cystic and Functional Parathyroid Adenoma in Patients with Double Parathyroid Adenomas: a Case Report

Abstract Primary hyperparathyroidism is usually caused by single adenoma. Ectopic adenomas are a frequent cause of recurrent or persistent hyperparathyroidism. Parathyroid cysts are rarely seen and most of them are non functional. This case report describes a patient with double adenoma, one is solid and cervical, the other is cystic and located in mediastinum; both of them are functional.