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2014, Number 1

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Anales de Radiología México 2014; 13 (1)

Correlation between electroencephalography and magnetic resonance in children with epilepsy

Bermea - Mendoza JH, Onofre – Castillo JJ, Valero - Castillo R, Putz - Botello MD, Franco – Hervert A, De Alba – Guevara CA
Full text How to cite this article

Language: Spanish
References: 6
Page: 53-58
PDF size: 684.82 Kb.


Key words:

Epilepsy, Hippocampus, Electroencephalography, Magnetic Resonance Imaging, Comparative study.

ABSTRACT

Introduction. There are tools to quantitatively study the volume of the hippocampus. Such study would help to complement, more objectively and precisely, structural alterations that may be associated with the data obtained from electroencephalograms.
Material and methods. Seventeen patients, between 3 and 11 years of age, with diagnosis of first-time seizures and from whom magnetic resonance studies and electroencephalograms were available, were analyzed.
Results:.The left temporal lobe was involved in 3 patients, of whom 1 (5%) was found to be normal in the magnetic resonance and 2 (11%) abnormal with diagnoses of venous angioma and cortical atrophy. No significant difference was found between the two groups for the results obtained with resonance (Student p value: 0.6) and those obtained with electroencephalography (Student p value: 0.3). Electroencephalographic alterations in the frontal region were observed in 8 (47%) patients, 4 (23%) predominantly left, 1 (5%) right, and 3 (17%) bilateral; of those, in 5 (29%) cases the resonance was normal, one had left temporal atrophy, one diagnosis of meningitis, and one more of medulloblastoma.
Discussion. In the remaining 3 (17%) patients we found generalized cortical involvement in the electroencephalogram, but resonance found one normal study, one suprasellar ependymoma, and one patient with agenesis of the corpus callosum.
Conclusion. it was not possible to show a statistically significant value that could relate the results obtained by magnetic resonance with those obtained by electroencephalography.


REFERENCES

  1. Provenzale James M, Barboriak Daniel P, VanLandingham Kevan. Hippocampal MRI Signal Hyperintensity After Febrile Status Epilepticus Is Predictive of Subsequent Mesial Temporal Sclerosis, Department of Radiology, Duke University Medical Center, AJR 2008;190:976–83.

  2. Wen-Chau Wu, Chao-Ching Huang, Hsiao-Wen Chung. Hippocampal Alterations in Children with Temporal Lobe Epilepsy with or without a History of Febrile Convulsions: Evaluations with MR Volumetry and Proton MR Spectroscopy, Department of Radiology, Tri-Service General Hospital and National Defense Medical Center. AJNR 2005;26:1270–5.

  3. Doelken MT, Richter G, Stefan H. Multimodal Coregistration in Patients with Temporal Lobe Epilepsy - Results of Different Imaging Modalities in Lateralization of the Affected Hemisphere in MR Imaging Positive and Negative Subgroups, From the Departments of Neuroradiology, Neurology, Epilepsy Center, Nuclear Medicine , and Neurosurgery University of Erlangen-Nuremberg, Erlangen, Germany. AJNR 2007;28:449 –54.

  4. Doelkena MT, Richtera G, et al. Multimodal Coregistration in Patients with Temporal Lobe Epilepsy -Results of Different Imaging Modalities in Lateralization of the Affected Hemisphere in MR Imaging Positive and Negative Subgroups. AJNR 2007;28:449-54.

  5. L. Anne Mitchell, A. Simon Harvey, et al. Anterior Temporal Changes on MR Images of Children with Hippocampal Sclerosis: An Effect of Seizures on the Immature Brain? AJNR 2003;24:1670-7.

  6. Akio Ikeda, Waro Taki, et al. Focal ictal direct current shifts in humanepilepsy as studied by subdural and scalp recording. Brain journal of neurology Oxford university 1999;122:827-38.




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Anales de Radiología México. 2014;13