Please use this identifier to cite or link to this item: http://ahro.austin.org.au/austinjspui/handle/1/9849
Title: Structural abnormalities remote from the seizure focus: a study using T2 relaxometry at 3 T.
Authors: Briellmann, Regula S;Jackson, Graeme D;Pell, Gaby S;Mitchell, L Anne;Abbott, David F
Affiliation: Brain Research Institute, Austin Health, Melbourne, Australia.
Issue Date: 28-Dec-2004
Citation: Neurology; 63(12): 2303-8
Abstract: To determine the extent and severity of mesial temporal and subcortical signal abnormalities in patients with partial epilepsy.T2 relaxation time maps were acquired in 50 consecutive patients and 55 control subjects on a 3 T MRI scanner. Twenty-two patients had hippocampal sclerosis (HS), 16 had malformations of cortical development (MCD), and 12 had no obvious MR abnormalities (normal MR). The following eight regions were measured bilaterally: hippocampus, anterior temporal lobe (ATL) white matter, amygdala, frontal lobe white matter, caudate, putamen, pallidum, and thalamus.In patients with HS, increased T2 relaxation times were found in the ipsilateral hippocampus and ATL but not in subcortical nuclei. In patients with MCD, increased T2 relaxation times were found in the temporal lobe (hippocampus, ATL) and in subcortical areas (caudate, putamen, and pallidum); in patients with normal MR, increased T2 relaxation times were found in the hippocampus and putamen. The degree of abnormality did not correlate with the duration of epilepsy or the estimated seizure load.Mesial temporal structures show increased T2 relaxation times not only in patients with hippocampal sclerosis but also in patients with a seizure focus remote from the hippocampus. Patients with normal MR and focal malformations of cortical development have increased T2 relaxation times in subcortical structures. Therefore, abnormalities in T2 relaxation time can be found remote from the seizure focus. They cannot be simply attributed to secondary seizure effects.
Internal ID Number: 15623691
URI: http://ahro.austin.org.au/austinjspui/handle/1/9849
URL: http://www.ncbi.nlm.nih.gov/pubmed/15623691
Type: Journal Article
Subjects: Adolescent
Adult
Basal Ganglia.pathology
Brain.abnormalities.pathology
Epilepsies, Partial.pathology
Female
Hippocampus.pathology
Humans
Magnetic Resonance Imaging.methods
Male
Organ Specificity
Preoperative Care
Sclerosis
Single-Blind Method
Temporal Lobe.pathology
Appears in Collections:Journal articles

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