PMC5908385_01
An axial computed tomography image showing a soft tissue density occupying the left maxillary sinus and passing through the posterior choana to the nasopharynx.
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This lesion extended to the nasopharynx through the posterior choana (Fig. 1).
Coronal computed tomography scans show a calcified mass in the left nasal cavity. (A) This mass showed a single cell in the anterosuperior area (asterisk) and a connection to the remnant of the middle turbinate (arrow). (B) The middle turbinate and ethmoid cells were not seen except for the insertion site to the skull base (arrow). Note that the calcified mass is positioned downward.
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The middle turbinate was not observed either, except for a remnant of the lamellar portion anteriorly and the insertion site to the skull base posteriorly (Fig. 2A and B).
The irregular shaped osteoma that was extirpated completely by endoscopic sinus surgery.
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After dissecting the mucosa using a microdebrider and an elevator, the bony mass was removed (Fig. 3).