Research reportIntractable frontal lobe epilepsy: Pathological and MRI features
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Postscript: What terminology is appropriate for tissue pathology? How does it predict outcome?
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Cited by (54)
A minority of patients with functional seizures have abnormalities on neuroimaging
2021, Journal of the Neurological SciencesCitation Excerpt :For MRI, definitive EAF included but was not limited to hippocampal sclerosis, tuberosclerosis complex, focal cortical dysplasia, and encephalomalacia [46–56]. Borderline EAF included but was not limited to hippocampal atrophy without T2 hyperintensity, hippocampal T2 hyperintensity without atrophy, subtle or questionable findings for focal cortical dysplasia [57–62]. ERF included cortically based infarcts or T2 hyperintensities, cavernous malformations, old supratentorial intracerebral hemorrhages, and cortically adjacent masses [63–67].
Use of interictal <sup>18</sup>F-fluorodeoxyglucose (FDG)-PET and magnetoencephalography (MEG) to localize epileptogenic foci in non-lesional epilepsy in a cohort of 16 patients
2015, Journal of the Neurological SciencesCitation Excerpt :Despite a pronounced reduction in epilepsy surgery complication rates in the last 3 decades, the inability to accurately localize the epileptogenic zone preoperatively, especially in patients with non-lesional epilepsy, may reduce the efficacy of epilepsy surgery and result in persistent postoperative seizures [13]. Previous studies have found that severe postoperative seizures tended to be observed in cases where no foci or lesions were found preoperatively [1,14,16,21]. Invasive intracranial electroencephalography (EEG) monitoring is the gold standard for locating the epileptogenic zone [13], however interictal 18F-fluorodeoxyglucose (FDG)-positron emission tomography (PET) and magnetoencephalography (MEG) may provide valuable preoperative data on epileptogenic foci in cases of non-lesional epilepsy.
Extratemporal epilepsies
2012, Handbook of Clinical NeurologyCitation Excerpt :Although scalp electrodes showed a widespread seizure onset and the MRI was read as normal or nonlocalizing, the use of subdural grid electrodes that covered frontal areas extensively were reported to localize the seizure onset zone in more than 90% by several authors (Blume et al., 2001; Cukiert et al., 2001b). Surgical series showed lesions on MRI in 46–97% of the patients (Cascino et al., 1992; Laskowitz et al., 1995; Lorenzo et al., 1995; Menzel et al., 1997; Janszky et al., 2000b; Jobst et al., 2000; Schramm et al., 2002). In 38 children, the rate of lesions detected by MRI was found to be only 32% compared with 97% in 17 children with mesial TLE (Lawson et al., 2002).
Frontal lobe seizures
2005, Psychiatric Clinics of North AmericaCitation Excerpt :In this situation, ictal EEG will identify these seizures and differentiate them from psychogenic unresponsiveness. High-resolution MRI, which can identify lesions in the frontal lobe such as tumors or vascular malformations, is imperative for the evaluation of frontal lobe seizures [45]. MRI should include sequences to better identify dysplasias (eg, fluid-attenuated inversion-recovery sequences), vascular malformations, and blood products (eg, proton density imaging).
Predictors of epilepsy surgery outcome: A meta-analysis
2004, Epilepsy Research