Frontoethmoidal Sinus Schwannoma Eroding Through the Nasal Bone: Case Report and Literature Review

The sinonasal cavity is an extremely rare location for schwannomas to arise. In this location, a sinonasal schwannoma is thought to either arise from Schwann cells of sensory nerve fibers in the sinonasal mucosa or from the autonomic nervous system. We report a case of sinonasal schwannoma presumed to be metastatic papillary thyroid carcinoma based on the patient’s medical history as well as the presence of adjacent bony destruction on CT imaging. We discuss the clinical presentation and treatment of this patient as well as review the literature.