Ethmoidal Sinus Schwannoma: Case Report and Review

Aim: To highlight the need for benign nasalshwannoma to be included in any differential diagnosis of any soft tissue mass of the sinonasal spaces. Methodology/ Case Description: A 45 year old female presented with Right sided nasal obstruction for 1 year along with mouth breathing, with no history of anosmia or hyposmia, epistaxis, difficulty in breathing. On examination, Anteriorrhinoscopy right side nasal polypoidal mass, Examination of Eye and Oral cavity found to be normal. On nasal endoscopy right side nasal polyp extending to posterior choana occupying the right nasal cavity with deviated septum towards left side. CT PNS shows findings of polypoidal lesion noted at right sided ethmoidal air cells and right nasal cavity extending posteriorly up to right side nasopharynx. Intraoperatively polyp identified and removed as a piece meal and sent for HPE. Histopathology suggestive of schwannoma with spindle cell proliferation. Follow up Nasal endoscopy shows no evident of recurrent polyps. Result: A case of Ethmoidal sinus shwannoma, a bening nasal mass presented as a right Antrochoanalpolyp, CT Scan reported as a antrochoanal polyp which was removed completely surgically by Functional Endoscopic sinus surgery procedure without any post operative complication of nerve involvement and patient has been not yet reported with recurrent polyp or smell disturbances till date. Conclusion: Aparanasal sinus shwannomas arising from ethmoid sinus can be removed completely removed by Functional endoscopic sinus surgery without any Nerve injury /cranial nerve palsy.