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Pseudo bilateral synchrony in frontal lobe epilepsy. This patient presented with seizures following the surgery for left frontal brain abscess in the past. (A) In this longitudinal bipolar montage, bifrontal polyspike-wave discharges (X, Y) appear synchronous. However, focal sharp wave discharges are evident involving F3 electrode at Z. (B) The MRI demonstrating left frontal encephalomalacia.
