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Figure 1. Coronal CT image depicting the key anatomy of the ethmoid bone. CG: Crista galli; FO: fovea ethmoidalis; CP: cribriform plate;
OF: olfactory fossa; LP: lamina papyracea; PP: perpendicular plate of the ethmoid bone; CT: computed tomography.
Figure 2. Coronal CT image depicting the key anatomy of the anterior OMU. MO: Maxillary ostium; I: infundibulum; HL: hiatus
semilunaris; MM: middle meatus; UP: uncinate process; CT: computed tomography; OMU: ostiomeatal unit.
imaging are to distinguish inflammatory from neoplastic disease and to determine the nature and extent of
the tumor (tumor mapping). The highest diagnostic accuracy is achieved using both CT and MR [9,11] .
