PMC5982477_01
MRI showing transverse view of the brain. Hemimegalencephaly of the right side of the brain can be easily identified. A cephalhematoma can also be seen on the right
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F1
Initial workup included EEG, which showed excessive sharp EEG transients more over the right hemisphere, and MRI of the brain, which showed asymmetric enlargement of the right cerebral hemisphere and diffuse thickening of cortical gray matter with increased myelination over right hemisphere, suggestive of right-sided HME [Figure 1].
EEG recording shows predominantly right-sided spike, polyspikes, and wave discharges
JPN-13-106-g002.jpg
PMC5982477_01_JPN-13-106-g002.jpg
F2
Another EEG was conducted that showed right-sided dominant spikes, polyspikes, sharps, and slow wave discharges [Figure 2].