Large right nasal cavity mass (11 cm); expansion of ostiomeatal complex and posteriorly fills nasopharynx and comes across to left choana.
Thinning of lamina papyracea but no intraorbital soft tissue abnormality. No intracranial breach.
Evidence of chronic obstruction with right pterygoid base sclerosis, maxillary hyperostosis with erosion lateral maxillary wall.
No variant sinus anatomy.