Brown tumor of the facial bones.

Brown tumors are expansile osteolytic lesions of bone, occurring in hyperparathyroidism. They occur more commonly in primary hyperparathyroidism, and tend to regress after the removal of parathyroid adenomas [1]. They are much less common in secondary hyperparathyroidism but have been reported [1]. Brown tumors occur most commonly in ribs , mandible, clavicle, and pelvis, and are uncommon in the facial bones [2, 3]. We report two cases, one of primary hyperparathyroidism and one of secondary hyperparathyroidism involving the paranasal sinuses.