Epilepsy Clinical Trial
Official title:
Study of Metabolic Connectivity in Drug-resistant Temporal Epilepsy
18F-Fluoro-deoxy-glucose (18F-FDG) positron emission tomography (PET) has a high sensitivity for temporal lobe epilepsy (TLE), the most common form of focal epilepsy, with a detection range of 86-90% . Therefore, 18F-FDG PET is a useful tool to identify the epileptogenic zone (ETZ) in the inter-ictal phase of drug-resistant temporal epilepsy during pre-surgical evaluation . Based on stereotactic electroencephalography (SEEG) findings, a correspondence between electrical data and metabolic changes on PET was found at the group level by identifying four different patterns of TLE . As expected, hypometabolism was not limited to the EZ defined by SEEG, but underlay broader epileptic networks . Because of the different electroclinical presentations of TLE, 18F-FDG PET appears to be a very useful tool in these temporal epilepsies. Indeed, it has been recently demonstrated that a gradient of PET hypometabolism from the uninvolved area to the spreading area, then to the epileptogenic area and to the lesion area is observed with consequently a good performance of 18F-FDG PET in defining the EZ . Therefore, it is interesting to study PET metabolism as a network and not as a combination of regional metabolic measures in epilepsy.
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