Changes seen on skull imaging studies (CT, MRI, other):
(1) mass within the nasal cavity with displacement of the nasal septum
(2) antral bowing sign (anterior bowing of the posterior wall of the maxillary sinus)
(3) destruction of the medial wall of the maxillary sinus
(4) distortion of the pterygoid plates
(5) erosion of the hard palate
(6) widening of the inferolateral aspect of the superior orbital fissure
(7) involvement of the cavernous sinus, optic chiasm region or sella region in advanced disease
The tumor is highly vascular, with branches primarily coming from the external carotid artery but also the internal carotid artery.
