Name : Morteza
Family : Sanei Taheri
Affiliation :Radiology Department,Shohada Tajrish Hospital,SBMU
Academic Degree : Associate Professor of Radiology
Resident : Afarin Sadeghian
Head & Neck Imaging
Gender : Male
Age : 51
51-year-old man presented with a few-month history of nasal obstructive symptoms
Axial non-enhanced CT scan images show an expansile soft-tissue mass posteriosuperiorly in the left nasal cavity causing remodeling and erosion of the nasal septum as well as the lateral nasal wall.On MR images,the mentioned mass demonstrates heterogeneous signal intensity,mostly high on T2- and low on T1-weighted images associated with heterogeneous intense enhancement on contrast-enhanced image and extends up to the ethmoidal air cells.There is no evidence of intracranial or intraorbital extension.Hemorrhagic pituitary macroadenoma is also seen.
1.Inverted papilloma,2.Antrochoanal polyp,3.Juvenile nasopharyngeal angiofibroma,4.Olfactory neuroblastoma,5.Paranasal sinus mucocoele
Discussion (Related Text)
Sinonasal schwannoma is generally a well-defined soft-tissue mass most frequently occurring in the nasal cavity and ethmoid sinus and frequently associated with pressure remodeling of the adjacent bone. These tumors are isoattenuating on CT and predominantly isointense on both T1- and T2-weighted MR images,compared with the brainstem.Mild contrast enhancement on CT and strong enhancement on MR images were also demonstrated in most of the tumors. Although sinonasal schwannomas are rare and their imaging findings are rather nonspecific, CT and MR imaging studies are helpful for preoperative diagnosis and surgical planning in patients with schwannoma of the sinonasal cavity.
Y.S. Kim, H.-J. Kim, C.-H. Kim, and J. Kim,F:CT and MR Imaging Findings of Sinonasal Schwannoma,AJNR,34:628–33 ,Mar 2013