Parathyroid carcinoma: diagnosis and management.

A patient with severe hypercalcemia and a palpable neck mass is presented. The highest calcium was 18.8 mg/dL. A left lower neck mass was felt on examination. The trachea was deviated to the right side on a chest film. A barium swallow demonstrated an indentation on the left side of the esophagus. An en-bloc resection of the mass including the thyroid lobe, the strap muscles, and the recurrent laryngeal nerve was done. The pathologic specimen revealed parathyroid carcinoma with dense fibrous septae, invasion of the capsule, and vascular invasion. The patient is alive and without evidence of hypercalcemia or recurrence of the disease 23 years after surgery, probably the longest survivor with carcinoma of the parathyroid gland. Parathyroid carcinoma should be suspected in any patient with severe hypercalcemia and a palpable mass. The best chance for cure is obtained by performing a wide surgical excision during the initial operation.