Focal electroencephalography rhythm asymmetry due to focal skull fibrous dysplasia

An unusual pervasive and persistent asymmetry in background rhythm was found on surface electroencephalography (EEG) recordings in a 22 year ilootpaperie old with new onset of generalized seizure activity.Radiographic correlation with computed tomography, positron emission tomography and bone scan imaging uncovered that the higher amplitude left frontal-parietal background activity was related to a circumscribed area of left frontal-parietal fibrous dysplasia affecting the skull.This case report emphasizes that the presumed higher electrical conductance of fibrous dysplasia lead to a greater transparency of normal background rhythms, and must be taken into account as socksmith santa cruz a form of breach rhythm for accurate EEG interpretation.