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- W2095191782 abstract "Epilepsy surgery has been successfully performed in patients with tuberous sclerosis complex (TSC) and seizures arising from a restricted epileptogenic area. The outcome of cortical excision depends on accurate pre-surgical identification of the epileptogenic tuber. [11C] α-methyl-l-tryptophan (α-MTrp) was originally developed to measure serotonin synthesis in vivo with positron emission tomography (PET). However in pathologic conditions its uptake may also depend on the synthesis of quinolinic or kynurenic acid via the kynurenine pathway. Increased levels of serotonin and quinolinic acid have been observed in epileptogenic lesions, raising the possibility that α-MTrp PET may localize the epileptogenic area. The aim of this study was to correlate α-MTrp PET uptake with the localization of the epileptogenic area and with interictal spike frequency in patients with TSC. α-MTrp uptake was measured in 8 patients (2 males, mean age 29.6±14.9 years, range 3–50 years) with intractable partial epilepsy due to TSC. All patients underwent scalp EEG monitoring during the PET scan. In four (50%), increased uptake of α-MTrp occurred in the epileptogenic area alone. Two (25%) patients showed multifocal abnormalities and the remaining two (25%) did not show focal changes. PET localization was mostly seen in patients with frequent interictal abnormalities on the EEG. Furthermore, there was a significant correlation between α-MTrp uptake and the frequency of interictal spikes (r=0.6; P<0.05). α-MTrp PET is a promising diagnostic tool in the localization of the epileptogenic area in patients with TSC." @default.
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- W2095191782 date "2003-01-01" @default.
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- W2095191782 title "α-[11C]-Methyl-l-tryptophan PET identifies the epileptogenic tuber and correlates with interictal spike frequency" @default.
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- W2095191782 doi "https://doi.org/10.1016/s0920-1211(02)00216-4" @default.
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