Hyperparathyroidism: robotic-assisted thoracoscopic resection of a supernumary anterior mediastinal parathyroid tumor.

Intrathoracic supernumary fifth-gland parathyroid disease is an unusual presentation for primary hyperparathyroidism. Patients generally present with enlargement of one of the normal four cervical parathyroid glands. This paper is a case report of a young woman who presented with typical symptoms of hyperparathyroidism. She, however, had an atypical anatomic finding, and this case offers a unique means of resection.