Fig. 5.

MRI coronal T1-w fat sat after gadolinium (A) showing a pathologic hyperintense tissue surrounding the cavernous ICA aneurysm and extending toward Meckel’s cave (superior arrow) and, inferior, to the infratemporal fossa (inferior arrow); axial T1-w fat saturation after gadolinium (B) showing a pathologic hyperenhancement of the ipsilateral pachimeninges (anterior arrow) and tentorium (posterior arrow); 3-dimensional time-of-flight (C) showing a further worsening of the irregular and narrow appearance of the intracranial siphon (arrow); fluid attenuation inversion recovery T2-w (D) images revealing the occurrence of left hemispheric small foci of subacute ischemia (arrow).