A Mysterious Paratracheal Mass: Parathyroid Carcinoma.

Parathyroid carcinoma is a rare cause of primary hyperparathyroidism. We detail a 60-years-old gentleman who was otherwise healthy presented to the hospital due to acute encephalopathy. He was subsequently found to have parathyroid carcinoma as the cause of the acute encephalopathy with impressive serum calcium and parathyroid hormone levels. The parathyroid carcinoma was later surgically resected with the diagnosis confirmed via pathology specimen. The patient was safely discharged from the hospital with recommendations of close routine outpatient followup.