Fig. 4

Follow-up magnetic resonance imaging of the brain at our institute 8 months after the onset of the symptoms. A T2W axial image of the brain at the level of the Meckel’s caves shows ballooning of the Meckel’s cave bilaterally. The white arrows point towards the ballooning of bilateral Mecksl’s caves. B T2W coronal image of the brain at the level of the optic chiasm shows expanded chiasmatic cistern with displaced optic chiasm. The white arrow points towards the displaced optic chiasm. C T2W axial image of the brain at the level of the velum interpositum. There is expansion of the velum interpositum with hyperintense signal as demonstrated with black arrow. D Axial FLAIR image of the brain at the level of velum interpositum shows no signal suppression in the velum intrepositum on FLAIR, as pointed out with black arrow, in comparison with T2W image shown in C. E Post-contrast T1W coronal image of the brain at the level of the orbits depicts enhancement along bilateral optic nerves as pointed out with white arrows. F Post-contrast T1W coronal image at the level of the Meckel’s cave shows avid enhancement is noted along bilateral Meckel’s caves and internal acoustic canals as shown with the help of white arrows. G Post-contrast T1W axial image at the level of the internal acoustic canals showing avid contrast enhancement along the bilateral Meckel’s caves and the internal acoustic canals as demonastrated with white arrows