Squamous cell carcinoma of the paranasal sinus
The patient complained of frontal headaches, diplopia. There was a mass at the upper inner quadrant of his right orbit.
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CT showed an infiltrating soft tissue mass with moderate enhancement within the right frontal sinus and ethmoid cells. There were extensive bony destructions of the medial orbital wall, the anterior wall of the frontal sinus and the ethmoid cell walls. Biopsy revealed squamous cell carcinoma.