ACTA CHIRURGICA BELGICA, vol.106, no.6, pp.736-738, 2006 (SCI-Expanded)
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.