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Fig. 2A. —44-year-old man with 18-month history of painless, sagging right eye. Unenhanced CT image in coronal plane reveals fully developed opacified right maxillary sinus. Uncinate process is apposed to inferomedial orbital floor, occluding maxillary sinus infundibulum (arrow). Associated lateral retraction of medial sinus wall and middle turbinate with enlargement of middle meatus (asterisk) can be seen. Orbital floor is retracted into sinus lumen (arrowhead).