Massive schwannoma of the nose and paranasal sinuses.

Schwannomas, uncommon tumors of the nose and paranasal sinuses, are discovered late in their clinical course because of their obscure anatomic location. In this report, we have described the clinical findings in a massive nasal schwannoma (neurilemoma) that obstructed both nares, the left maxillary sinus, and the ethmoid sinuses, and protruded from the oropharynx and nose. The preoperative work-up included both computerized tomographic and magnetic resonance imaging studies.