Legend A lobulated T1 iso-, T2 heterogeneously bright mass expands the right posterior ethmoid and sphenoid sinuses. The mass has eroded the clivus to extend into the prepontine cistern. The pituitary gland sits on top of the mass.

Legend The mass enhances heterogeneously and extends laterally into the right cavernous sinus and superior orbital fissure. It encases the right cavernous ICA without significant narrowing. Key words: mri mra tumor neoplasia

ENT Diagnosis: Inverted papilloma