 Axial plane of CT-PNS image showing, soft tissue density lesion completely occluding right maxillary sinus, extending anteriorly into the right nasal cavity through the widened ostium with mass effect on the nasal septum resulting in deviated nasal septum with convexity toward the left side and atrophy of the corresponding middle turbinate due to compression. The absence of medial wall of the right maxillary sinus with thinning of the medial pterygoid plate on the right side suggestive of bony involvement.PNS - paranasal sinuses