Bilateral pyriform sinus parathyroid adenomas.

Parathyroid glands undergo a variable descent during embryologic development and can be found anywhere in the neck from the level of the mandible to the mediastinum. To the best of our knowledge, we present the first report of a patient who was found to have bilateral parathyroid adenomas in her pyriform sinuses. A middle-aged woman with renal failure and secondary hyperparathyroidism presented with dysphagia and was found to have bilateral pyriform sinus masses on endoscopy. We performed direct laryngoscopy and surgical excision of these masses, and they were found to be parathyroid adenomas. Her dysphagia improved postoperatively, and she continues to be followed by her endocrinologist, who manages her secondary hyperparathyroidism medically. The differential diagnosis for hypopharyngeal masses is wide and should include parathyroid adenomas, even in patients with bilateral masses.