fig22

Figure 22. ENB, Kadish Group B (nasal cavity and paranasal sinus involvement). (A) Coronal CT shows soft-tissue attenuation in the left superior nasal cavity and ethmoid sinus; (B) Coronal T2-weighted MRI shows a mildly hyperintense tumor in the left nasal cavity and ethmoid sinus. Peripheral entrapped fluid (red arrow) shows marked hyperintensity compared with the tumor (yellow arrow); (C) Post-contrast T1-weighted MRI demonstrates relatively homogeneous solid enhancement of the tumor (yellow arrow), whereas the entrapped fluid shows only peripheral enhancement (red arrow). ENB: Esthesioneuroblastoma; CT: computed tomography; MRI: magnetic resonance imaging.