Rasmussen encephalitis with active inflammation and delayed seizures onset

Severe focal epilepsy is regarded as a clinical hallmark of Rasmussen encephalitis (RE). The authors report two children with progressive hemiparesis, contralateral hemispheric atrophy, and pathologic features characteristic for RE. At histologic diagnosis and over several months, neither patient experienced seizures. The report enlarges the clinical spectrum of RE and suggests that seizures are not an obligatory presenting symptom of the disorder.     

Physical activity,stigma, and quality of life in patients with epilepsy

Indication of physical activity (PA) for people with epilepsy (PWE) is debatable. This study investigated whether the International Physical Activity Questionnaire (IPAQ) score is related to the clinical aspects of epilepsy, QOLIE-31, and the Stigma Scale of Epilepsy (SSE) score of 67 PWE at a significance level of 5% (p < 0.05).About one-third (32.8%) of the PWE were sedentary/irregularly active. Lower QOLIE-31 scores and higher SSE scores were found in PWE who did not practice PA for fear of seizures and in sedentary/irregularly active PWE. Twenty-three percent of the PWE stopped practicing PA for fear of seizures. The predictive factors in the logistic regression equation for not practicing physical activity for fear of seizures were the presence of depressive disorder (p = 0.049) and temporal lobe epilepsy with hippocampal sclerosis (TLE-HS) (p = 0.024).Most PWE are sedentary and do not practice PA for fear of seizures. Physical activity is negatively influenced by clinical aspects of epilepsy. Less PA is associated with depressive disorder, worse quality of life, and higher perception of stigma.     

Seizure frequency in children with epilepsy: Factors influencing accuracy and parental awareness

RationaleThe objective of this study was to ascertain the accuracy of clinical reports to determine the seizure frequency in children diagnosed with epilepsy.MethodsWe reviewed the clinical record of 78 children (January–May of 2006) admitted to the EEG–video monitoring with epilepsy diagnosis. Clinical reports of parents and the files of EEG–video monitoring were reviewed to determine parents’ awareness for seizures.ResultsDuring video–EEG monitoring, 1244 were recorded on 78 children. Seizures were confirmed in 1095 of which 472 were correctly reported (38%) by parents whereas 623 remained under-reported (50%). Parents’ report thus had a sensitivity of 43%, positive predictive value of 76% to identify seizures. Based on the EEG–video monitoring, seizures were reported accurately in 22 (28%) and under-reported in 38 (49%) children. In the under-reported group, none of the seizures were recognized in 10 (13%), only a portion identified in 28 children. The parents’ report describing seizure frequency has limited value for young children (p = 0.01) and children with absence seizures (p = 0.03). However, clinical reports were accurate for the children with developmental delay (p < 0.06) or not being on any anticonvulsant drug (AED) therapy (p = 0.02).ConclusionOur results indicate that a significant number of seizures remain under-reported by parents of children with epilepsy. The current study underscores that the seizure frequency should be interpreted with caution for young children and children with absence seizures. Video–EEG recording has a complimentary role to the clinical observation for the accurate assessment of seizure frequency in children.     

Extrarolandic electroclinical findings in the evolution of adult-onset Rasmussen's encephalitis

Rasmussen's encephalitis (RE) is a rare immunomediated disorder characterized by unilateral hemispheric atrophy, drug-resistant focal epilepsy, and progressive neurological deficits. Its onset typically occurs in childhood, though it has also been reported in adult age (A-RE) with atypical clinical features. The aim of this study was to describe the electroclinical features in a group of seven patients with A-RE.We retrospectively studied seven women aged 23–43 years (mean: 32.1 years) with a diagnosis of RE according to commonly accepted diagnostic criteria. All the patients were clinically evaluated and underwent prolonged video-EEG monitoring, laboratory investigations, and high-resolution MRI follow-up.All the patients displayed an ictal electroclinical pattern whose evolution varied. We identified an early phase characterized by polymorphic ictal electroclinical manifestations (temporal semiology in five cases, frontal in one, and parietal in the remaining case) and a late phase clinically characterized by viscerosensitive phenomena followed by somatosensitive signs, experiential symptoms, and motor signs in all the cases. In the late phase, the ictal EEG pattern was characterized by monomorphic, pseudorhythmic, repetitive slow-wave theta activity over the frontal and central regions, with ipsilateral propagation and/or secondary spreading to contralateral perisylvian structures. Patients were treated with a combination of AEDs and immunotherapy (steroids and IVIg); epilepsy surgery was performed in 3 cases.Our results show that A-RE is characterized by early and late clinical- and EEG-different features which may reflect a progressive involvement of a specific “extrarolandic” network in the advanced phase of the disease and may suggest that the electroclinical expression of RE varies according to the different stages of the pathological process.     

Neonatal eating epilepsy: 50-year follow-up

PurposeWe present a case of neonatal eating epilepsy.MethodCase report.ResultsAn otherwise healthy female newborn started having epileptic seizures lasting up to 5 minutes induced by breastfeeding at age of 2 weeks. The convulsive seizure started with crying and coughing followed by opisthotonus, flexion of upper extremities, extension of lower extremities, and generalized jerks in extremities. The patient had fairly often postictal vomitings which could not be relieved by upright positioning. At baseline clinical examination, no abnormal symptoms or signs were found except for a postictal hoarseness. On the day of admission to the tertiary care hospital, during 1.5 hours, she had 10 attacks. Though some attacks were spontaneous and during sleep, most were induced by feeding or — less often and inconsistently — by manipulating the pharynx. Phenobarbital 15 mg four times a day stopped the attacks. The last seizure was documented 14 days after admission and phenobarbitalwas eventually withdrawn. The patient remained seizure free off AEDs during a prospective follow-up for over 50 years until 2013.ConclusionsNeonatal eating epilepsy may be a suitable diagnosis if convulsive seizures are precipitated by feeding or eating. Polygraphic recording will help ascertain the diagnosis. Antiepileptic therapy is likely to abolish seizures.     

Psychosocial impairments in children with epilepsy depend on the side of the focus

This article explores the idea that epileptic activity may interfere with psychosocial functions and development in children. In an adult population with epilepsy, left hemispheric seizure focus predicts worse psychosocial functioning. The developmental aspects of these disturbances require further studies. We studied self-report measures of cognitive (locus of control) and emotional (Beck Youth Inventories of Emotional and Social Impairment) functions in 30 children with partial epilepsy (6–15 years) and 60 healthy matched controls. Multivariate statistics revealed significant lateralization effects, with left-sided foci (n = 15) leading to more external locus of control. Opposite to adults, the children with right hemispheric foci (n = 15) exhibited more emotional impairments (anger, disruptive behavior) than the left hemispheric group. The cognitive and emotional dysfunctions in epilepsy may result from the interaction of focus lateralization and brain development. The cognitive disturbances beginning in childhood may lead to the stronger emotional impairments observed in adults with left hemispheric seizures.     

Prevalence of epilepsy in a cohort of patients with multiple sclerosis

IntroductionEpilepsy prevalence is 0.27–1.7% in general population. However, higher figures have been reported in Multiple Sclerosis (MS) patients, suggesting this association is not coincidental.MethodsWe retrospectively reviewed the records of MS patients seen between 2009 and 2012 at Pontificia Universidad Católica of Chile's Multiple Sclerosis Center.ResultsOf 310 MS patients, ten had the diagnosis of epilepsy (3.2%). These patients were younger, and had an earlier onset of symptoms of MS compared to the group without epilepsy (32 vs. 40 years, p = 0.04 and 25 vs. 32 years, p = 0.02, respectively). In 4 patients, seizures were the first MS symptom and the most frequent seizure type was partial secondary generalized (6 patients). MRI showed cortical lesions in all patients. Patients with poor epilepsy control (frequent seizures or development of status epilepticus) had lower brain volumes and worse cognitive performance. All patients received antiepileptic drugs as well as immunomodulatory therapy.ConclusionPatients with epilepsy and MS are younger and have an earlier onset of symptoms. Since most seizures were partial, the presence of cortical lesions and progressive brain atrophy could probably be the pathophysiological mechanism underlying this association.     

TRPV1 promotes repetitive febrile seizures by pro-inflammatory cytokines in immature brain

Febrile seizure (FS) is the most common seizure disorder in children, and children with FS are regarded as a high risk for the eventual development of epilepsy. Brain inflammation may be implicated in the mechanism of FS. Transient receptor potential vanilloid 1 (TRPV1) is believed to act as a monitor and regulator of body temperature. The role of inflammation in synaptic plasticity mediation indicates that TRPV1 is relevant to several nervous system diseases, such as epilepsy. Here, we report a critical role for TRPV1 in a febrile seizure mouse model and reveal increased levels of pro-inflammatory factors in the immature brain. Animals were subjected to hyperthermia for 30 min, which generates seizures lasting approximately 20 min, and then were used for experiments. To invoke frequently repetitive febrile seizures, mice are exposed to hyperthermia for three times daily at an interval of 4 h between every time induced seizure, and a total of 4 days to induce. Behavioral testing for febrile seizures revealed that a TRPV1 knock-out mouse model demonstrated a prolonged onset latency and a shortened duration and seizure grade of febrile seizure when compared with wild type (WT) mice. The expression levels of both TRPV1 mRNA and protein increased after a hyperthermia-induced febrile seizure in WT mice. Notably, TRPV1 activation resulted in a significant elevation in the expression of pro-inflammatory cytokines (IL-1β, IL-6, TNF-α and HMGB1) in the hippocampus and cortex. These data indicate that the reduction of TRPV1 expression parallels a decreased susceptibility to febrile seizures. Thus, preventative strategies might be developed for use during febrile seizures.     

Characteristics and clinical impact of stimulation-evoked seizures during extraoperative cortical mapping

Extraoperative electrocortical stimulation mapping (ESM) is used to identify functional cortex prior to epilepsy surgery, with the goal of preserving function postoperatively. Although attempts are made to avoid stimulation-evoked seizure activity, the clinical impact of these events with regard to safety, clinical utility, functional outcome, and even disruption to the procedure itself is unknown. We conducted a retrospective review of 57 patients with pharmacoresistant focal epilepsy who underwent intracranial electrode implantation and ESM. Stimulation-evoked seizures (afterdischarges associated with clinical signs or symptoms) occurred in 19 patients (33%). Mapping sessions were disrupted for 11 of these patients (i.e., 19% of the full sample and 58% of the subgroup of patients with stimulation-evoked seizures). Patients who had ESM disruption were no less likely than patients without ESM disruption to be seizure-free at one year (p = 0.63) and two years (p = 0.57) postoperatively. Among 23 patients who underwent language assessment pre- and postoperatively, 4 (17%) had evoked seizures that disrupted language mapping; these patients were no more likely to show postoperative language declines relative to those who had no ESM disruption (p = 0.26). Results suggest that evoked seizures occur frequently during ESM and can disrupt the procedure; however, these events do not appear to adversely affect postoperative outcomes. Nevertheless, attempts should be made to limit stimulation-evoked seizures in order to reduce patient discomfort, increase efficiency, and maximize the utility of ESM.     

Gastaut type-idiopathic childhood occipital epilepsy and childhood absence epilepsy: A clinically significant association?

We report an unusual association between idiopathic occipital epilepsy and childhood absence epilepsy in 2 pediatric patients. At first clinical and electroencephalographic evaluation, the patients presented the peculiar signs of idiopathic occipital epilepsy Gastaut type: focal sensory visual seizures, migraine-like symptoms (only in one patient) and unilateral spike–wave discharges over occipital regions. Both children were treated with valproic acid and their seizures were rapidly controlled. After a seizure-free period, the patients presented typical absence with ictal electroencephalographies showing 3 cycles/s generalized and symmetrical spike–wave complexes. We discuss the possible association between these two epileptic syndromes and its common pathophysiological mechanisms.     

Disparities in injury death location for people with epilepsy/seizures

ObjectiveWide variation has been reported in the proportion of injury deaths occurring during the prehospital phase. Potential disparities in where injured people with epilepsy and seizure disorders die have not been examined. We compared location of death between injured patients with epilepsy and seizure disorders and similar patients without epilepsy/seizures and tested the hypothesis that injured people with epilepsy/seizures are more likely to die outside of a hospital or health care setting.MethodsU.S. vital statistics (mortality) data from the multiple cause of death files of the National Center for Health Statistics were analyzed. Patients less than 65 years of age at death who had injury as the underlying cause of death were included. Multinomial logistic regression was used to assess location of death, controlling for patient and injury characteristics.ResultsControlling for potential confounders, people with epilepsy/seizures were more likely to die at home from unintentional injuries (relative risk ratio [RRR] = 1.51, P < 0.001) and less likely to die in public places (RRR = 0.27, P < 0.001). People with epilepsy/seizures were less likely to die at home or in public places from suicide, but significantly more likely to die at home from homicide (RRR = 2.29, P < 0.001). By mechanism of injury, people with epilepsy/seizures were more likely to die at home from drowning (RRR = 2.35, P < 0.001).DiscussionDisparities in where injured people with epilepsy/seizures die deserve further attention. Identifying the underlying causes of these disparities will allow for the development of targeted prevention interventions.     

Physical injuries in patients with epilepsy and their associated risk factors

ObjectivesTo determine the frequency, nature, and risk factors associated with physical injuries in patients with epilepsy.MethodsIn this retrospective cohort study, patients 18 years of age and older with active epilepsy for at least 1 year were included. A questionnaire (including age, gender, education, type of epilepsy, seizure frequency, having aura, drug compliance, polypharmacy, comorbidity, type and place of injury) was completed from patients and healthy individuals. Statistical analyses were performed using multiple logistic regression and Chi-square tests.Results264 patients with epilepsy and 289 healthy participants were studied. Among patients, 8.7% reported severe injuries and 44.3% had mild injuries. Most patients reported soft tissue injuries, followed by dental injury, burn, and head injury. Severe injuries were 2.9 times more frequent among patients having generalized tonic–clonic seizures (GTCS) compared to healthy control; this was not statistically significant (P = 0.07). No patient reported having severe injuries due to SPS, myoclonic or absence seizures. Mild injuries were 10.3 times more frequent among those with GTCS compared to healthy control (P = 0.001). The relative risk for having injury in patients compared to control group was 3.42 (95% confidence interval: 2.50–4.69). Injury was significantly related to having GTCSs, illiteracy, having fall with seizures, comorbidity and having uncontrolled seizures.ConclusionPhysical injuries are common in patients with epilepsy; however most of these injuries are mild. Severe injuries rarely occur in patients with seizures other than GTCS.     

Health-care access among adults with epilepsy: The U.S. National Health Interview Survey, 2010 and 2013

IntroductionCommunity-based and other epidemiologic studies within the United States have identified substantial disparities in health care among adults with epilepsy. However, few data analyses addressing their health-care access are representative of the entire United States. This study aimed to examine national survey data about adults with epilepsy and to identify barriers to their health care.Materials and methodsWe analyzed data from U.S. adults in the 2010 and the 2013 National Health Interview Surveys, multistage probability samples with supplemental questions on epilepsy. We defined active epilepsy as a history of physician-diagnosed epilepsy either currently under treatment or accompanied by seizures during the preceding year. We employed SAS-callable SUDAAN software to obtain weighted estimates of population proportions and rate ratios (RRs) adjusted for sex, age, and race/ethnicity.ResultsCompared to adults reporting no history of epilepsy, adults reporting active epilepsy were significantly more likely to be insured under Medicaid (RR = 3.58) and less likely to have private health insurance (RR = 0.58). Adults with active epilepsy were also less likely to be employed (RR = 0.53) and much more likely to report being disabled (RR = 6.14). They experience greater barriers to health-care access including an inability to afford medication (RR = 2.40), mental health care (RR = 3.23), eyeglasses (RR = 2.36), or dental care (RR = 1.98) and are more likely to report transportation as a barrier to health care (RR = 5.28).ConclusionsThese reported substantial disparities in, and barriers to, access to health care for adults with active epilepsy are amenable to intervention.     

Prognosis of status epilepticus (SE): Relationship between SE duration and subsequent development of epilepsy

In animal models, SE duration is related to epileptogenesis. Data in humans are scarce, mainly in NCSE; therefore, we aimed to study the prognosis of SE de novo and which factors may influence subsequent development of epilepsy.MethodsWe evaluated patients with SE without previous epilepsy at our hospital (February 2011–February 2014), including demographics, etiology, number of AEDs, duration of SE, mortality, and occurrence of seizures during follow-up.ResultsEighty-nine patients were evaluated. Median age was 69 (19–95) years old. Among them, 33.7% were convulsive. Regarding etiology, 59 were considered acute symptomatic (41 lesions, 18 toxic–metabolic), 17 remote or progressive symptomatic, and 13 cryptogenic. The median recovery time was 24 h (30 min–360 h). In-hospital mortality was 29% (n = 26). After a median follow-up of 10 months, 58.7% of survivors (n = 37) showed seizures. Subsequently, we analyzed which factors might be related to the development of epilepsy, and we found that epilepsy development was more frequent with longer SE duration (37 vs. 23 h, p = 0.004); furthermore, patients with a toxic–metabolic etiology developed epilepsy less frequently (33% vs. 67%; p = 0.022). Epilepsy was also correlated (tendency) with focal SE (p = 0.073), a lesion in neuroimaging (p = 0.091), and the use of 2 or more AEDs (p = 0.098). Regarding SE duration, a cutoff of above 24 h was clearly related to chronic seizures (p = 0.014); however, combining etiology and duration, the association of longer SE and epilepsy was significant in acute lesional SE (p = 0.034), but not in epilepsy with cryptogenic or remote/progressive etiology. After a logistic regression, only a duration longer than 24 h (OR = 3.800 (1.277–11.312), p = 0.016) was found to be an independent predictor of the development of epilepsy.ConclusionIn patients with SE, the longer duration is associated with an increased risk of subsequent epilepsy at follow-up, mainly in symptomatic SE due to an acute lesion. It is unclear if it might be the result of a more severe injury causing both prolonged seizures and subsequent epilepsy, and therefore whether more aggressive treatment in this group might avoid this possibility. Most of the patients with cryptogenic or remote/progressive SE developed epilepsy regardless of SE duration.This article is part of a Special Issue entitled “Status Epilepticus”.     

Seizure severity in children with epilepsy is associated with their parents' perception of stigma

AimsTo develop and implement interventions to improve the quality of life (QOL) in children with epilepsy, it is important for clinicians and researchers to understand the effects of the children's parents' perception of stigma. The purpose of this study was to identify a relationship between patient clinical characteristics and perception of stigma in the parents of children with epilepsy.MethodsParents of children with epilepsy were recruited from our university hospital between April 1, 2005 and March 31, 2012. Items for the Parent Stigma Scale were developed from the literature and open-ended interviews with parents of children with epilepsy about their concerns and fears, including those related to stigma. Parents were asked to respond to five items, each on a 5-point scale from 1 (strongly disagree) to 5 (strongly agree). Assessments were performed for each clinical characteristic, such as child's sex, age at seizure onset, family history of epilepsy, seizure frequency, presence of status epilepticus (SE), presence of treatment-related adverse events, and the scores of each scale.ResultsA total of 52 parents of children with epilepsy and 10 parents of healthy children were enrolled in the study. Parents of children with epilepsy showed significantly higher scores on the questionnaire than parents of healthy children. In multiple regression analysis, greater perceptions of stigma were associated with a seizure frequency of more than one per month (p = 0.0036, B = 1.104, β = 0.402). In contrast, the presence of prior febrile seizures (p = 0.0034, B = − 1.297, β = − 0.308) and family history of epilepsy (p = 0.0066, B = − 1.613, β = − 0.277) were associated with lower perceptions of stigma. Greater parental perceptions of stigma were seen with the presence of monthly seizures.ConclusionsParents of children with epilepsy are at risk of significant perceptions of stigma. Seizure severity, indicated by the presence of monthly seizures, was associated with greater perceptions of stigma in parents. In addition, the presence of prior febrile seizures and family history of epilepsy were associated with fewer perceptions of stigma. The findings of this study emphasize the importance of acknowledging and addressing parental perceptions of stigma.     

The attentional networks in benign epilepsy with centrotemporal spikes

Benign epilepsy affecting children with normal mental development often occurs at a particular age, responds well to medication, and could be resolved completely by puberty. Although several studies have shown neuropsychological disabilities of children with benign epilepsy with centrotemporal spikes (BECTS), there is no clear evidence about the impairment of attentional systems and the comorbidity of attentional problems. Our research was based on the attention network model and assessed the characteristics of three anatomically defined subnetworks (alerting, orienting, and executive control) of 90 children with BECTS and 90 healthy children. All the subjects enrolled in the study participated in the attention network test (ANT) with assessment of both the reaction time (RT) and accuracy of the test. The results indicated that the performance of healthy controls was significantly better in orienting of attentional system (P < 0.001) and the accuracy of attention network test (P < 0.001), compared with that of children affected by BECTS. The grand mean effect (higher score worse) was significantly higher (P < 0.001) in the patient group than that in the control group. The multiple linear regression analysis revealed a positive correlation between the age of onset and the accuracy of attention network test results, and a negative correlation between the age of onset and the results of grand mean effect. A negative correlation was observed between spike index (SI) of the non-REM sleep stage and the accuracy of attention network test results. We found no relationship between the grand mean effect and clinical factors such as gender, duration of clinical course, duration of seizures, total number of seizures, severity of seizures (seizure frequency), hemispheric lateralization of electroencephalograph (EEG), and the awake SI. Furthermore, no relationship was observed between the clinical factors and the accuracy of the test results. The findings showed that BECTS is associated with impaired attentional networks, and impairments are greater at younger ages of onset.     

Is elevated pre-ictal heart rate associated with secondary generalization in partial epilepsy?

BackgroundPeople with epilepsy are at risk for sudden unexpected death. Cardiac arrhythmia is one possible mechanism. We have studied seizure-related changes in cardiac rhythm.MethodsVideo-EEG and ECG from 38 patients with epileptic seizures during long-term monitoring for investigation of partial epilepsy with ictal impairment of consciousness were obtained. Seizures were classified as either complex partial or secondarily generalized. Inter-ictal, pre-ictal, ictal and post-ictal heart rate was calculated for the first recorded seizure.ResultsHeart rate during the pre-ictal period was higher (p = 0.016) in patients with secondarily generalized seizures (n = 11) compared to patients with complex partial seizures (n = 27). Heart rate was also elevated during and after generalized seizures (p < 0.015). Inter-ictal heart rate was not different in patients with secondary generalization compared to patients with partial seizures.ConclusionWe report elevated heart rate prior to partial seizure onset in those attacks which become secondarily generalized compared to seizures which remain localized. The finding may be relevant for the understanding of sudden death in epilepsy.     

Impact of stigma on the quality of life of patients with refractory epilepsy

PurposeTo assess the impact of perceived stigma on the quality of life of Bulgarian patients with refractory epilepsy.MethodsWe studied 70 adult patients with refractory epilepsy, without cognitive impairment, progressive somatic, neurological disease or recent seizures, and 70 patients with pharmacosensitive epilepsy. All participants completed a 3-item stigma scale, the patients with refractory epilepsy also completed a Health Related Quality of Life measure (the QOLIE-89).ResultsThe patients with refractory epilepsy had a mean disease duration 25.1 ± 1.3 years. 40.0% of patients (±5.9) had symptomatic epilepsy. Seventeen patients (24.2% ± 5.1) had partial seizures, 16 (22.8% ± 5.0) had generalized seizures and 37 (52.9 ± 6.0) had a mixture of partial and generalized seizures. Most participants had several seizures per week (45.7%) or month (30.0%) despite the fact that 90% were taking combination antiepileptic drug treatment. We found perceived stigma in 43.6% of patients with refractory epilepsy, and 28.7% self-reported severe stigmatization. Only 4 (5.7%) patients with pharmacosensitive epilepsy reported stigmatization which was mild or moderate in all cases. Perceived stigma had a negative impact on the overall score of the QOLIE-89 (T-score 47.8), as well as on all subscales of QOLIE-89, with the exception of “change in health” and “sexual relations”. Patients with refractory epilepsy reporting stigmatization most commonly had very low and low scores on the subscales “health perceptions” (82.9%), “emotional well-being” (71.5%), “memory” (63.4%) and “health discouragement” (62.5%). There was a negative correlation of all QOLIE-89 subscales with perceived stigma severity.ConclusionAll aspects of the quality of life of Bulgarian patients with refractory epilepsy correlate negatively with the severity of perceived stigma.     

Electrocorticogram changes during corpus callosotomy for uncontrolled symptomatic generalized epilepsy

We report a 19-year-old man who presented to our facility with medically intractable, symptomatic generalized epilepsy manifesting as generalized tonic–clonic seizures (GTCs). Before he underwent an anterior callosotomy (6 cm), these seizures, which he had experienced for 11 years, seemed to have a left-sided focal origin. Intraoperatively, no epileptiform discharges were found on the electrocorticogram (ECoG) performed prior to sectioning, but more than 10 left-sided seizures were recorded after sectioning. In the 10 years since surgery, the patient’s seizures have remained generalized; however, the frequency and severity of the seizures have decreased. These findings indicate that the presence of electrocorticographic seizures, as measured by ECoG immediately following callosotomy, may not predict a poor surgical outcome, even though such a finding might be indicative of epileptogenicity in general.