All issues > Volume 51(3); 2008

Original Article

Korean J Pediatr. 2008;51(3):286-292. Published online March 15, 2008.

Analysis on the association between EEG and 2-deoxy-2-[18F]-D-glucose (FDG)-PET findings in children with epilepsy

Yun Jung YJ Hur¹, Joon Soo JS Lee¹, Jong Doo JD Lee², Heung Dong HD Kim¹

¹Department of Pediatrics, Yonsei University College of Medicine, Seoul, Korea
²Department of Radiology, Yonsei University College of Medicine, Seoul, Korea

Correspondence Heung Dong HD Kim ,Email: hdkimmd@yumc.yonsei.ac.kr

Abstract

Purpose
: We performed EEG and PET on children with epilepsy concomitantly in order to evaluate the effects of epileptiform and non-epileptiform discharge of EEG on glucose metabolism.
Methods
: Seventy three children with epilepsy who had PET and EEG simultaneously were included in our study. The subjects were classified in two ways: (1) based on the frequency of epileptiform discharge and (2) the severity of non- epileptiform discharge. We evaluated the clinical aspects of their seizures, the severity of focal slow waves during the interictal period with the frequency of spikes or sharp waves in order to compare with the PET results.
Results
: The subjects were divided by the frequency of epileptiform discharge, with 13 in the no/rare group, 7 in the occasional group, and 53 children in the frequent group. The concordant rates with PET in each group were 0%, 42.9%, and 67.9%, respectively, showing high correlations with the frequency of epileptiform discharge (P<0.05, r=0.491). The subjects as divided by the severity of non-epileptiform discharge were 15 in the no group, 25 in the infrequent group, 17 in the intermediate group, and 16 in the continuous group. The concurrence rates with PET for each group were 13.3%, 52.0%, 64.7%, and 68.8%, respectively, also showing a high correlation with the severity of non-epileptiform discharge (P<0.05, r= 0.365).
Conclusion
: Epileptiform discharge and non-epileptiform discharge in EEG showed a certain association with hypometabolism in PET. We recommend EEG to reduce false lateralization and to localize lesions in cases of high frequency and severity.

Keywords :Fluorodeoxyglucose F18, Positron-Emission Tomography, Electroencephalography