Mouth breather, recurrent sinusitis
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Computed tomography demonstrated a soft tissue mass that arises in the sphenoid sinus, widening the spheno-ethmoidal recess and extend to the left coana. In both floors of the maxillary sinuses are displayed a probable retention cyst.
Although antrochoanal polyps are the most frequent, this polyps can also originate in the sphenoid sinus as in this case.