Fig. 2

Magnetic resonance imaging of the brain at 2 months following the onset of symptoms. A Axial T1W post-gadolinium image of the brain at the level of the mid-brain shows nodularity of leptomeningeal enhancement. The black arrows point towards the nodular leptomeningeal enhancement along the Sylvian fissures. B T2W axial image of the brain at the level of the mid-brain shows expansion of the quadrigeminal cistern with inhomogeneous signal of the CSF. The black arrows are seen to point towards the inhomogeneous CSF signal in the quadrigeminal cistern. C Axial FLAIR image of the brain at the level of mid-brain shows complete signal suppression as compared with T2W image in B. The black arrows depict the suppression of CSF signal on FLAIR. D Post-contrast T1W axial images of the brain show enhancement along the CSF spaces corresponding to the T2 and FLAIR images. The black arrows point towards the enhancement along the CSF spaces