fig23

Figure 23. ENB, Kadish Group C (extension beyond nasal cavity and paranasal sinuses). (A) Coronal CT shows soft-tissue attenuation in the bilateral nasal cavities and ethmoid sinuses, with dehiscence of the cribriform plate (red arrow); (B) Coronal T2-weighted MRI shows a sinonasal tumor extending intracranially through the right cribriform plate (red arrow). T2-hyperintense trapped fluid is seen in the right maxillary sinus, along with a rounded T2-hypointense lesion at the sinus floor (yellow arrow); (C) Post-contrast T1-weighted image shows relatively homogeneous solid enhancement of the sinonasal tumor, with early intracranial dural invasion (red arrow) and an enhancing satellite lesion at the floor of the right maxillary sinus (yellow arrow). ENB: Esthesioneuroblastoma; CT: computed tomography; MRI: magnetic resonance imaging.