BACKGROUND: It is unclear which factors lead to progressive neuronal damage in mesial temporal lobe epilepsy (MTLE). The objective of this study was to evaluate whether progressive hippocampal and extrahippocampal atrophy occur in patients with MTLE and whether this atrophy is related to seizures. METHOD: We performed 2 MRI scans in 33 patients with clinical and electroencephalographic diagnosis of MTLE and in 24 healthy controls. MRI was performed in a 2-T scanner, and a T1-weighted gradient-echo sequence with 1 mm thickness was used for voxel-based morphometry analysis. Follow-up images were obtained at least 7 months after the first baseline MRI. Comparisons between the patient's follow-up and baseline MRIs, and between patients and controls, were performed. A corrected p value of 0.05 was set as the threshold for the statistical analysis. RESULTS: Follow-up MRI was performed after a median interval of 39 months (range 7-85 months). Three patients were seizure-free between the first and second MRIs. We observed progressive white and gray matter atrophy (p < 0.05) in patients with MTLE. This progression was more intense in patients with left MTLE compared with right MTLE. A higher frequency of seizures and a longer duration of epilepsy were associated with progression of gray and white matter atrophy in patients with MTLE. CONCLUSION: The progression of white and gray matter atrophy in patients with mesial temporal lobe epilepsy (MTLE) was more intense in patients with left MTLE and was associated with poorer seizure control and a longer duration of epilepsy.
BACKGROUND: It is unclear which factors lead to progressive neuronal damage in mesial temporal lobe epilepsy (MTLE). The objective of this study was to evaluate whether progressive hippocampal and extrahippocampal atrophy occur in patients with MTLE and whether this atrophy is related to seizures. METHOD: We performed 2 MRI scans in 33 patients with clinical and electroencephalographic diagnosis of MTLE and in 24 healthy controls. MRI was performed in a 2-T scanner, and a T1-weighted gradient-echo sequence with 1 mm thickness was used for voxel-based morphometry analysis. Follow-up images were obtained at least 7 months after the first baseline MRI. Comparisons between the patient's follow-up and baseline MRIs, and between patients and controls, were performed. A corrected p value of 0.05 was set as the threshold for the statistical analysis. RESULTS: Follow-up MRI was performed after a median interval of 39 months (range 7-85 months). Three patients were seizure-free between the first and second MRIs. We observed progressive white and gray matter atrophy (p < 0.05) in patients with MTLE. This progression was more intense in patients with left MTLE compared with right MTLE. A higher frequency of seizures and a longer duration of epilepsy were associated with progression of gray and white matter atrophy in patients with MTLE. CONCLUSION: The progression of white and gray matter atrophy in patients with mesial temporal lobe epilepsy (MTLE) was more intense in patients with left MTLE and was associated with poorer seizure control and a longer duration of epilepsy.
Authors: Fabrício R S Pereira; Andréa Alessio; Maurício S Sercheli; Tatiane Pedro; Elizabeth Bilevicius; Jane M Rondina; Helka F B Ozelo; Gabriela Castellano; Roberto J M Covolan; Benito P Damasceno; Fernando Cendes Journal: BMC Neurosci Date: 2010-06-02 Impact factor: 3.288
Authors: N Erkut Kucukboyaci; H M Girard; D J Hagler; J Kuperman; E S Tecoma; V J Iragui; E Halgren; C R McDonald Journal: J Int Neuropsychol Soc Date: 2011-10-12 Impact factor: 2.892
Authors: Camille Garcia-Ramos; Sam Bobholz; Kevin Dabbs; Bruce Hermann; Juho Joutsa; Juha O Rinne; Mira Karrasch; Vivek Prabhakaran; Shlomo Shinnar; Matti Sillanpää Journal: Hum Brain Mapp Date: 2017-04-03 Impact factor: 5.038
Authors: Kevin Dabbs; Tara Becker; Jana Jones; Paul Rutecki; Michael Seidenberg; Bruce Hermann Journal: Epilepsia Date: 2012-04-03 Impact factor: 5.864