Fig. 5
A 37-year-old male with proven inverted papilloma of the right maxillary sinus. Axial computed tomography (a) reveals non-specific maxillary sinus opacification with focal hyperostosis at its postero-lateral wall. Axial T2-weighted image (b) shows linear striations divergent from the site of focal hyperostosis. T2 image also nicely differentiates obstructed secretions from solid mass reflecting moderate diffusivity with black-out effect of focal sclerosis at diffusion image (c) and apparent diffusion co-efficient value of 1.2 × 10-3 cm2/s, as measured in apparent diffusion co-efficient map (d). Axial fat suppressed post-gadolinium image (e) reveals linear striations may be less or equal to visibility in T2-weighted image. Coronal computed tomography image (f) shows smooth widening of the ostio-meatal unit with nasal extension of the maxillary mass