fig26

Figure 26. SMARCI-deficient sinonasal carcinoma: Axial CT (A) and Axial MRI (B-D: T2, post-contrast T1, DWI) images show an aggressive mass in the right sphenoid sinus with heterogeneous T2 intensity, restricted diffusion, and heterogeneous enhancement. The tumor destroys the sinus wall and the bony covering of the right internal carotid artery, directly invading the right cavernous sinus (red arrows). A T2-hyperintense, non-enhancing trapped secretion causes dehiscence of the sphenoid clivus along the posterior sinus wall (blue arrows). CT: Computed tomography; MRI: magnetic resonance imaging; DWI: diffusion-weighted imaging.