The patient was a 19-year-old woman who presented with hemiatrophy and 
diminished superficial sensation on the left side of her body including her 
face. She had a past history of tonic-clonic seizures accompanied by left 
hemiparesis in late childhood. Brain CT demonstrated dilatation of the frontal 
sinus, calvarial thickening, cerebral hemiatrophy and dilatation of the lateral 
ventricle on the right side. Brain MRI showed atrophy of the right cerebrum and 
midbrain and dilatation of the lateral ventricle on T1-weighted images, as well 
as a high signal intensity area from the parietal to the occipital lobe on 
T2-weighted images. These findings are suggestive of an episode that may have 
caused a transient ischemia through the right cerebral hemisphere after the 
intrauterine period.