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Case 4 (A) Non enhanced axial CT shows bone erosion of the papyracea lamina of ethmoid bone. (B) Axial T2 weighted sequence shows an extraconal and intraconal mass (white arrows) in the right orbit, with non-homogeneous hyperintensity ed irregular margins. The lesion involves the nasolacrimal canal, the papyracea lamina and the anterior ethmoid cells.
