Selected images demonstrating a large mass lesion occupying the nasopharynx, sphenoid sinus as well as the posterior ethmoid air cells with lateral extension via left sphenopalatine fossa into the deep aspect of the left masticator space, anteriorly in the nasal chamber (in particular on the left side) as well as through the left superior and inferior orbital fissure into the orbital apex. There is deformity and decrease in size of the left maxillary sinus, secondary to the anterior displacement of the posterior wall.
Overall, findings are not compatible with an antrochoanal polyp, but suggestive of a large juvenile angiofibroma.