PMC6235514_01
Sinonasal computed tomography (CT) viewed at soft tissue windows shows a right nasal mass filling the right-side nasal cavity enhanced after injection of contrast product: (A) axial post-contrast CT; (B) coronal post-contrast; (C) sagittal post-contrast CT
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This finding found also a crenate appearance of the posterior nasal mucosa especially of the middle turbinates and contralateral inferior turbinate with a left deviation of the nasal septum with nasal spur (Figure 1).
Nasosinusal MRI showing the tissue mass measuring 4 x 2.8 x 3.5cm with ethmoidal sinus fluid retention without intracranial or orbital extension (on sequence: (A) sagittal T2; (B) axial T2 TSE Fast; (C) axial T2 DIXON Fat; (D) axial T1 TSE dixon in; (E) axial T1 TSE dixon W; (F) axial T1 TSE dixon Gadolinium in; (G) axial T1 TSE dixon Gadolinium W; (H) coronal T1 Gadolinium; (I) coronal T1 Gadolinium W)
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The appearance, even if it remains unspecific, is compatible with inverted papilloma (Figure 2).
The post-treatment magnetic resonance imaging showed retention in the right maxillary sinus without suspicious mass detected
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After 6 month follow-up, the patient was in complete clinical and radiological remission (Figure 3).