Brown tumor, an uncommon focal giant-cell lesion, arises as a direct result of the effect of parathyroid hormone on bone tissue in patients with hyperparathyroidism. The initial treatment involves the correction of hyperparathyroidism, which usually leads to tumor regression. We report a case of brown tumor of the right nasal fossa in a 71-year-old woman. The tumor had caused nasal obstruction and epistaxis. Laboratory evaluation revealed that the patient had primary hyperparathyroidism. Anatomicopathologic investigation revealed the presence of a giant-cell tumor. We performed a partial parathyroidectomy, but the tumor in the right nasal fossa failed to regress. One year later, we performed surgical resection of the lesion. The patient recovered uneventfully, and she remained asymptomatic and recurrence-free at the 1-year follow-up. Facial lesions with histologic features of a giant-cell tumor should be evaluated from a systemic standpoint. Hyperparathyroidism should always be investigated by laboratory tests because most affected patients are asymptomatic. Surgical resection of a brown tumor should be considered if the mass does not regress after correction of the inciting hyperparathyroidism or if the patient is highly symptomatic.
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