Brown tumor: clinical findings of secondary hyperparathyroidism in patients with renal osteodystrophy.

A brown tumor, or osteoclastoma, is a nonneoplastic bony lesion associated with hyperparathyroidism and directly related to increased levels of parathyroid hormone. These tumors result from excessive osteoclastic activity. This article presents 3 cases of brown tumor localized in facial bones. The lesions were the result of secondary hyperparathyroidism associated with chronic renal failure. The patients were two 42-year-old men and a 39-year-old woman. All patients had been treated systemically by hemodialysis for more than 10 years. This article highlights the importance of proper diagnosis and management of dental patients presenting with a brown tumor.