Fig. 1
From: Auditory hallucinations and migraine of possible brainstem origin
Axial FLAIR (fluid attenuated inversion recovery) (a) and coronal post-contrast T1-weighted (b) MR image through the midbrain at presentation shows a patchy hyperintense (a) and non-enhancing hypointense (b) lesion over the posterolateral aspect of the left cerebral peduncle (arrow), just below the level of the red nucleus. Follow-up MR (c) over 19 months showed a stable lesion (arrow). Single voxel H1 MR spectroscopy (d), epicentered over the lesion showed a choline/NAA ratio of 0.81