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Temporal lobe dysembryoplastic neuroepithelial tumour: significance of discordant interictal spikes Volume 6, numéro 2, June 2004

Figure 1. Figure shows an EEG sequence (1A) and a representative MR image (1B) of a patient with EEG abnormalities concordant with the localisation of the tumour. The EEG shown was acquired using the international 10-20 system of electrodes placement. It is a bipolar montage. The EEG shows right temporal sharp slow-waves. The figure 1B shows a T2-weighted coronal slice at the level of temporal lobes, acquired at a 3T GE scanner. The DNET is characterized by high signal intensity, and is localised in the right inferior and middle temporal gyri (arrow).

Figure 2. Figure shows an EEG sequence (2A) and a representative MR image (2B) of a patient with EEG abnormalities discordant with the localisation of the tumour. The EEG montage was done as indicated in figure 1. The EEG (figure 2A) shows bifrontal, sharply contoured theta. The MRI image in figure 2B shows a, T2-weighted coronal slice at the level of temporal lobes. The DNET is characterized by high signal intensity on the left antero-mesial temporal lobe (arrow). This patient showed involvement of the amygdala, hippocampus and anterior-inferior part of the insular cortex.