A Case of Parathyroid Carcinoma in a Patient with Stage 3 Chronic Kidney Disease

Parathyroid carcinoma is a rare disease in patients with primary hyperparathyroidism. We experienced a case of parathyroid carcinoma presenting with hyperparathyroidism. A 62-year-old male patient had hypercalcemia, chronic kidney disease, and an elevated parathyroid hormone level for at least 3 months. An ultrasonogram and parathyroid scan did not show parathyroid neoplasm. He underwent left hemithyroidectomy and parathyroidectomy. Biopsy revealed a parathyroid carcinoma. His azotemia and hypercalcemia improved after surgery. (Korean J Med 2012;83:796-801)