CT of the paranasal sinuses (contrast enhanced)
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There is a large mass extending from the posterior right nasopharynx extending posteriorly with osseous destruction to occupy a majority of the sphenoid sinus. The lesion enters and expands the right foramen rotundum. The superolateral margin of the right sphenoid sinus shows a subtle bony defect adjacent to the mass but there is no evidence of intracranial extension. The mass extends into, fills and expands the right pterygopalatine fossa. Laterally, it extends through the pterygomaxillary fissure into the masticator space. There is bowing of the medial wall of the right orbit and the mass erodes portions of the posterior and medial wall of the right maxillary sinus.