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Figure 1: T2 axial (a), sagittal (b), coronal (c) images show a well-defined homogeneously T2 hypointense lesion in the sellar–suprasellar region, left cavernous sinus, sphenoid sinus with widening and erosion of sella, and infiltration into the clivus, hypothalamus, and anterior perforator substance region (arrows in c). There is complete encasement of the left cavernous internal carotid artery and further extension across foramen rotundum to the infratemporal fossa. Axial T2 FLAIR image (d) shows the hyperintensity involving the bilateral hypothalami. There is homogenous diffusion restriction with a low apparent diffusion coefficient (e and f)

Figure 1: T2 axial (a), sagittal (b), coronal (c) images show a well-defined homogeneously T2 hypointense lesion in the sellar–suprasellar region, left cavernous sinus, sphenoid sinus with widening and erosion of sella, and infiltration into the clivus, hypothalamus, and anterior perforator substance region (arrows in c). There is complete encasement of the left cavernous internal carotid artery and further extension across foramen rotundum to the infratemporal fossa. Axial T2 FLAIR image (d) shows the hyperintensity involving the bilateral hypothalami. There is homogenous diffusion restriction with a low apparent diffusion coefficient (e and f)