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We present a case of a 39-year-old female patient with acute stridor due to a large tumor located at the level of the upper third of her thoracic esophagus. Parathyroid gland tumors are unusual in the differential diagnosis of mediastinal tumors. This tumor was removed via a thoracocervical approach, which offers multiple advantages when used for tumors in this location. The eventual diagnosis on histology was parathyroid adenoma. The patient had no clinical evidence of metabolic abnormalities and her pre- and postoperative calcium and postoperative parathyroid hormone (PTH) levels were within normal limits. This case poses the interesting question of whether identification of elevated PTH levels is an absolute prerequisite for diagnosing parathyroid adenomas. It is an example of a difficult diagnostic and therapeutic problem.

Airway obstruction due to giant non-parathyroid hormone-producing parathyroid adenoma