Patterns of sinonasal obstruction | Radiology Reference Article
https://radiopaedia.org/articles/patterns-of-sinonasal-obstruction
WEBMay 20, 2020 · Ostiomeatal unit pattern. opacification of the ipsilateral maxillary sinus, frontal sinus, and anterior and middle ethmoid air cells. obstruction of the middle meatus. may be an incomplete pattern due to variable drainage pattern. causes: mucosal swelling, turbinate hypertrophy, polyps, tumors/masses, concha bullosa, paradoxical middle ...
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