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An Unusual Cause of Unilateral Nasal Obstruction: A Mucocele of the Maxillary Sinus

Figure. A: Coronal CT of the sinuses shows the complete opacification of the left maxillary and ethmoid sinuses and the soft tissue that extends into the left nasal cavity. Right ethmoid and maxillary sinusitis is also noted. B: Telescopic view (0°, 4 mm) of the left nasal cavity shows the large cystic mass filling the left middle meatus and nasal cavity. Note the septa/ deviation (NS= nasal septum). C: The mass is opened and completely removed with the microdebrider. D: Telescopic view after complete removal of the mucocele shows the large middle meatal window created by the long-standing pressure exerted by the expanding mucocele.