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60th Annual Meeting of the German Society of Neurosurgery (DGNC)
Joint Meeting with the Benelux countries and Bulgaria

German Society of Neurosurgery (DGNC)

24 - 27 May 2009, Münster

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Presurgical evaluation of anterior temporal lobe atrophy in patients with pharmacoresistant temporal lobe epilepsy using MRI volumetry

Meeting Abstract

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  • D. Hořínek - Department of Neurosurgery, First Medical Faculty, Charles University, Prague/CZ
  • L. Martinković - Department of Neurology, Second Medical Faculty, Charles University, Prague/CZ
  • M. Kynćl - Department of Radiology, Second Medical Faculty, Charles University, Prague/CZ
  • J. Amlerová - Department of Neurology, Second Medical Faculty, Charles University, Prague/CZ
  • P. Marusić - Department of Neurology, Second Medical Faculty, Charles University, Prague/CZ

Deutsche Gesellschaft für Neurochirurgie. 60. Jahrestagung der Deutschen Gesellschaft für Neurochirurgie (DGNC), Joint Meeting mit den Benelux-Ländern und Bulgarien. Münster, 24.-27.05.2009. Düsseldorf: German Medical Science GMS Publishing House; 2009. DocP16-11

doi: 10.3205/09dgnc432, urn:nbn:de:0183-09dgnc4325

Published: May 20, 2009

© 2009 Hořínek et al.
This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by-nc-nd/3.0/deed.en). You are free: to Share – to copy, distribute and transmit the work, provided the original author and source are credited.

Outline

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Objective: Hippocampal atrophy associated with hippocampal sclerosis (HS) in patients with pharmacoresistant temporal lobe epilepsy (TLE) may be associated with the atrophy of neocortex in the area of the anterior temporal lobe. The aim of the study was to compare the volume of the anterior temporal lobe equilateral to the epileptogenic zone to the contralateral side.

Methods: 1,5T high resolution MRI images (2mm slice thickness) were obtained in 15 subjects with TLE and histological evidence of HS. The volume of the anterior temporal lobe was measured by MRI volumetry. The posterior boundary was arbitrarily set at the first slice with temporal stem to be seen. The measurement was performed semi-automatically using the INSIGHT-SNAP software. To assess reliability, the intraindividual variability of the measurement was assessed in 10 subjects. The Wilcoxon signed rank was used for statistical analysis.

Results: The anterior temporal lobe volume on the side equilateral to the epileptogenic zone was significantly reduced in comparison with the contralateral side (p<0.05; 13.4±3.8cm3 versus 15.2±3.5cm3). The intraindividual variability of the measurement was 3.6%.

Conclusions: Pharmacoresistant temporal lobe epilepsy with hippocampal sclerosis is associated with the atrophy of the anterior temporal lobe equilateral to epileptogenic zone, which can be reliably assessed by MRI volumetry as a part of presurgical evaluation.

Supported by GACR 309/08/P223.