Benign Conditions
Benign conditions where trans-nasal endoscopic sinus surgery is gaining popularity.
Inverted papilloma: No pathognomonic radiological finding. Characteristically arise from the lateral nasal wall in the region of root of the middle turbiante and extend laterally into the sinuses. Potentially malignant condition.

Fig. :Axial section: Showing an Inverted Papilloma on (R) side.

Fig. : Coronal section: Showing an Inverted Papilloma on (R) side.
Rhinosporidiosis: Contrast enhancing lesion with no pathognomonic radiological finding.

Fig. : Coronal section: Showing an Rhinosporidiosis in the inferior meatus on (L) side.
PNS Osteoma: Small osteoma in the region of ethmoids can be removed endoscopically.
Fig. : Coronal section: Showing an Osteoma in anterior ethmoid sinus on (R) side.