Fig. 1. Brain magnetic resonance imaging findings. (A) The initial brain magnetic resonance image (transverse T2-weighted image) shows focal high signal intensity at the anterior limb of the right internal capsule, but no abnormal focal lesion in the brain parenchyma. (B) Brain magnetic resonance image (transverse T2-weighted image) obtained after one month of disease progression. The area of the high signal intensity lesionlesion (arrow) had decreased, but it was still present. (C) Brain computed tomography performed at the 2nd hospital day showed severe bilateral cerebral edema with consequent transtentorial herniation and basal cistern obliteration. Linear high density along the falx and a low attenuation lesion in the right frontal lobe were also observed. Emergent craniotomy and lesionectomy were performed for control of increased intracranial pressure.
