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We report a 72-year-old woman with complex partial status epilepticus who showed recurrent episodes of complex visual hallucinations (CVH). Brain diffusion-weighted magnetic resonance images revealed gyriform cortical hyperintensity in the right parietal, occipital and temporal lobes, and brain magnetic resonance angiograhy revealed a hyperintensity in the right dilated middle cerebral artery during ictal period. Ictal N-isopropyl-p-(iodine-123)-iodoamphetamine single photon emission computed tomography (123I-IMP-SPECT) with three-dimensional stereotactic surface projection (3D-SSP) 14 days after the onset of the first CVH revealed hyperperfusion in the right latero-inferior occipito-temporal region with relation to motion. CVH spontaneously subsided 17 days after the onset of the first CVH. CVH recurred one year after the first CVH. Ictal 123I-IMP-SPECT with 3D-SSP revealed marked hyperperfusion in the right lateral parietal region probably with relation to face and figure hallucinations. Ictal scalp EEGs revealed rhythmic polyspikes at 12 Hz with high amplitude (100-200 μV) in bilateral posterior occipital and temporal region with the right side dominance for 20 seconds and more in several occasions. Interictal 123I-IMP-SPECT with 3D-SSP 28 days after recurrence of CVH revealed marked hypoperfusion in the right lateral parietal region, and recovery of hypoperfusion in the right latero-inferior occipito-temporal region. These findings suggest that ictal CVH might be induced by the spread of epileptic discharges from the right parieto-occipito-temporal region with the old brain contusion (epileptogenic region) to the right latero-inferior occipito-temporal region and the right lateral parietal region (symptomatogenic regions).

rinshō shinkeigaku/rinsho shinkeigaku

Complex partial status epilepticus with recurrent episodes of complex visual hallucinations: study by using &lt;sup&gt;123&lt;/sup&gt;I-IMP-SPECT, brain MRI and EEG