PMC8072351_01
During interictal EEG, diffuse irregular high amplitude slow waves of bilateral symmetry were found.
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EEG showed numerous irregular high amplitude slow waves and sharp slow waves during the interictal period (Figure 1).
Timeline of the patient's clinical course and outcome (A). Diffusion-weighted magnetic resonance imaging (DW-MRI) of the head showed abnormal high signal intensity in the bilateral parietal lobe (B), anterior wedge, and occipital lobe (C). Head MRI-DWI re-examined after 1 year of follow-up revealed that the abnormal signal intensity of brain gray matter disappeared completely (D,E).
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The diffusion-weighted imaging (DWI) of the head MRI revealed that the bilateral parietal lobe, precuneus, and occipital lobe exhibited brain-like hyperintensity, with apparent diffusion coefficient (ADC) values of 0.000644-0.000811 (Figures 2B,C). At a 12-months follow-up, the child felt good and experienced no seizures (Figure 2A). No abnormality was found in MRI-DWI (Figures 2D,E).