title: Hyperdensity on CT after seizure: a pitfall.
abstract: A 12-year-old boy had a hyperdense area corresponding to a gyral pattern on an enhanced CT brain scan within 12 hours of his last seizure. The hyperdense area disappeared on a subsequent enhanced CT scan after he was seizure free for about 48 hours. The hyperdense area was in a location (mesial frontal lobe) predicted by the interictal physical exam findings and the seizure type recorded on video-EEG monitoring. We postulate that the CT abnormality was due to transitory increase of regional cerebral blood flow and vascular permeability.
mesh_terms: D002220:Carbamazepine / Q000627:therapeutic use; D002540:Cerebral Cortex / Q000000981:diagnostic imaging*; D002648:Child; D004569:Electroencephalography; D004830:Epilepsy, Tonic-Clonic / Q000000981:diagnostic imaging* / Q000188:drug therapy; D005071:Evoked Potentials / Q000187:drug effects; D006801:Humans; D008297:Male; D014057:Tomography, X-Ray Computed
chemical_list: D002220:Carbamazepine