PMC8669953_01
Magnetic resonance imaging (MRI) of the patient. (A) Shown is the preoperative MRI of the 2; 10 year old patient. (B) Normal MRI of the patient 6 months after surgery showing the malacic transformed medial infarct on the right side with no evidence of hemorrhage, infarction, or liquor circulatory disturbances.
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F1
A cranial MRI revealed a cystic parenchyma defect of the right parietotemporal side due to an ischemic stroke of his middle cerebral artery (Figure 1A). Since then, the patient has remained seizure-free (Figure 1B).
Electroencephalogram (EEG) of the patient. (A) Awake EEG after hemispherotomy under VPA. Hypersynchronous activity on the right frontocentral side over the disconnected hemisphere without evidence of clinical seizure signs and without evidence of transition to the left. (B) Six months after surgery without VPA, the EEG showed continuous right hemispheric dysfunction, hypersynchronic right frontocentral activity, and activation during sleep without clinical signs.
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F2
An EEG showed no evidence of leftward transition with no evidence of clinical seizure signs (Figure 2A). An EEG performed 6 months post-operatively showed no evidence of seizures (Figure 2B).