CT bone window, coronal view, at the level of the orbit, showing proptosis of bilateral globes. The red arrow indicates the invasion of the right orbital cavity, which had lateralized the right medial orbital wall, causing proptosis of the right globe (RG). The black arrow indicates similar invasion of the left orbit, with erosion of the left medial orbital wall and proptosis of the left globe (LG). The blue arrow indicates erosion of the anterior skull base, lateral to the cribriform plate. 