PMC4799558_01
(a) Axial fluid-attenuated inversion recovery images at 18 months after onset showed atrophy in the right caudate and putamen, high signals in the white matter. (b) Axial fluid-attenuated inversion recovery at 32 months after onset demonstrated the progression of atrophy in the right caudate and putamen, progressive gliosis of the white matter. (c and d) Electroencephalography at 18 months after onset showed less and lower amplitude K-complex and sleep spindles on right hemisphere during sleep.
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F1
In November 2013, MRI showed atrophy in the right hemisphere without contrast enhancement [Figure 1a]. Repeated EEG showed less sleep spindles and vertex sharp waves on right hemisphere without epileptiform potentials or persistent delta activity [Figure 1c and 1d]. In December 2014, repeated MRI demonstrated progressive right hemispheric atrophy, enlargement of bilateral frontal horn, and atrophy in the left insular, perisylvian cortex, and caudate [Figure 1b].