Memory changes in patients with hippocampal sclerosis submitted to surgery to treat mesial temporal lobe epilepsy.

PURPOSE: This study was performed with the purpose of analysing the relationship between epileptological and surgical variables and post-operative memory performance, following surgery for refractory mesial temporal lobe epilepsy (MTLE) due to hippocampal sclerosis (HS). METHODS: Logical memory (LM) and visual memory (VM) scores for immediate and late follow-up of 201 patients operated for MTLE/HS were reviewed. Scores were standardized with a control group of 54 healthy individuals matched for age and education. The Reliable Change Index (RCI) was calculated to verify individual memory changes for late LM and VM scores. A multiple linear regression analysis was carried out with the RCI, using LM and VM scores as well as the clinical variables. RESULTS: A total of 112 (56%) patients had right HS. The RCI of the right HS group demonstrated that 6 (7%) patients showed improvement while 5 (6%) patients showed decreased scores in late LM; for late VM, 7 (8%) patients presented improvement, and 2 (3%) patients showed poorer scores. RCI of the left HS group showed that 3 (3%) individuals showed improved scores, while scores of 5 (4%) patients worsened for late LM; for late VM, 3 (3%) patients presented higher scores and 6 (5%) showed lower scores. Left HS and advanced age at onset of the first epileptic seizure were predictors of late LM loss (p<.05). CONCLUSION: Left MTLE/HS and seizure onset at advanced ages were predictive factors for the worsening of late LM. We observed poorer baseline LM function in the left HS group and improvement of LM in some patients who had resection of the right MTL. Patients in the right HS group showed a higher percentage of reliable post-operative improvement for both VM and LM scores.

Relación entre psicopatología y epilepsia en la infancia: a propósito de un caso de esclerosis mesial temporal / Relationship between psychiatric disorders and epilepsy: A case report on mesial temporal sclerosis

Introducción: Hay un aumento de prevalencia de trastornos psiquiátricos en pacientes con epilepsia, especialmente de trastornos del humor, ansiedad y psicosis. Caso clínico Varón de 10años con alteraciones de conducta y desorganización que ingresa en Psiquiatría para estudio. Durante el ingreso presenta cuadro de vómito con disminución de consciencia. El EEG muestra actividad de fondo dentro de la normalidad, con signos de disfunción frontotemporal derecha, y en la RMN se aprecia asimetría entre ambas circunvoluciones hipocampales. El resto de las pruebas complementarias no presentan alteraciones. Se inicia tratamiento con lacosamida, con buena evolución, estableciéndose el diagnóstico de trastorno de conducta en contexto de esclerosis mesial temporal. Discusión La epilepsia temporal por esclerosis hipocampal es la forma más frecuente de epilepsia parcial secundariamente generalizada y se asocia a alteraciones en la regulación de las emociones y su reconocimiento facial, alteraciones de la memoria semántica y episódica y disfunción ejecutiva y visomotora. (AU)

Introduction: The prevalence of psychiatric disorders is higher in people with epilepsy than in the general population, especially affective disorders, anxiety, and psychosis. Case report A ten-year-old male with behavioural disorder and disorganization, admitted to the psychiatric ward for differential diagnosis. During his stay, he had an episode of vomiting followed by loss of consciousness. The EEG showed normal background activity with right-sided fronto-temporal dysfunction signs. The MRI featured loss of volume of the right hippocampal gyrus. Other diagnostic tests showed no alterations. Treatment with lacosamide was introduced. This was followed by clinical improvement, and a diagnosis of behavioural disorder due to mesial temporal sclerosis was established. Discussion Temporal epilepsy due to hippocampal sclerosis is one of the most common causes of secondary generalised seizures, and is associated with deficits in emotion processing and facial emotion recognition, semantic and episodic memory, and executive and visual-motor dysfunction. (AU)

[Clinical and pathological definition of temporal medium epilepsy subtypes with hypocampic sclerosis]. / Definición clínico-patológica de los subtipos de epilepsia temporal medial con esclerosis del hipocampo.

BACKGROUND AND OBJECTIVE: Mesial temporal lobe epilepsy with hippocampal sclerosis is the most common cause of refractory epilepsy, and the most common indication for surgery. Although effective, surgery fails in up to 40% of patients. The objective of our study was to establish a correlation between the different histological subtypes of mesial temporal lobe epilepsy with hippocampal sclerosis and the prognosis, seizures control, side effects and anticonvulsivant drug withdrawal in patients with refractory epilepsy. PATIENTS AND METHOD: Clinical histories and anatomopathological specimens of 228 patients with temporal epilepsy surgically obtained at our hospital between 1993 and 2014 were retrospectively analysed. All patients underwent a standard preoperative evaluation and anterior temporal resection (modified from Spencer). The anatomopathological study included the standard hematoxylin-eosin and immunohistochemical protocol, with special interest in the assessment of neuronal loss with NeuN. Seizure control was assessed according to the scale of results of the ILAE and Engel. The mean follow-up was 8.6 years (2-19). RESULTS: At 10 years after the intervention, 67.9% of patients were seizure-free (ILAE 1) and as many as 77.5% of the patients were seizure-free (Engel 1) at the end of the follow-up. The probability of not having a seizure (ILAE 1) after surgery at 2 (p=.042), 5 (p=.001) and 7 years (p=.22) was higher in classic and severe forms compared to isolated sclerosis CA1 and CA4 forms. Higher neuronal loss measured with the NeuN immunostain in CA1 was associated with better outcome in seizure management (multivariate analysis, p=.08). The presence of a personal history of epilepsy was associated with greater neuronal loss in CA1 (p=.028) and CA3 (p=.034), and the presence of psychic auras was related with greater neuronal loss in CA3 (p=.025). In our case, the probability of medication withdrawal was related to the presence of personal history (p=.003) and, inversely, to neuronal loss in CA1 (p=.036) and CA3 (p=.038). The greatest impairment of verbal memory occurred in those patients with a lower neuronal loss in CA1 (p=.023), CA2 (p=.049) and CA3 (p=.035). CONCLUSIONS: The results indicate that the classical and severe subtypes have a better prognosis in the control of seizures against the atypical forms, validating the clinical and prognostic utility of the classification of histological subtypes of hippocampal sclerosis from the ILAE. The value of the immunohistochemistry in the mesial temporal lobe epilepsy with hippocampal sclerosis has been demonstrated as a key element to determine the neuropsychological prognosis and seizure management of the patients after surgery.

Memoria autobiográfica en pacientes con epilepsia del lóbulo temporal por esclerosis hipocampal / Autobiographical memory in patients with temporal lobe epilepsy by hippocampal sclerosis

Introducción: la epilepsia del lóbulo temporal (ELT) suele cursar con trastornos en el funcionamiento mnésico. Es probable que el paciente con epilepsia tenga dificultades en la memoria autobiográfica, principalmente en los casos donde la etiología es la esclerosis hipocampal (EH). Objetivo: determinar las posibles alteraciones de la memoria autobiográfica en los pacientes con epilepsia del lóbulo temporal por esclerosis hipocampal, en comparación con personas sanas. Material y métodos: la muestra estuvo conformada por 25 pacientes con diagnóstico electroclínico e imagenalógico de ELT por EH y fue contrastada con 15 controles sanos. A los pacientes que previamente habían sido valorados por neurología y neuropsicología, se les suministró la Entrevista de Memoria Autobiográfica para valorar el desempeño en memoria personal semántica e incidentes autobiográficos. Para la comparación de los pacientes frente a los controles en memoria autobiográfica, se utilizó la prueba U de Mann Whitney y se calculó el tamaño del efecto no paramétrico. Resultados: los pacientes presentaron dificultades en el recuerdo de la información personal semántica de los últimos cinco años y marcadas alteraciones en el recuerdo de incidentes autobiográficos relacionados con la niñez, la adultez y la vida reciente. Conclusión: los resultados confirman las dificultades que los pacientes con ELT por EH presentan en la activación de rastros de memoria en el hipocampo para la evocación y re-experimentación detallada de los incidentes autobiográficos de toda su historia personal.

Introduction: The temporal lobe epilepsy (TLE) is usually associated with memory disorders. Patients with epilepsy probably will have difficulties in the autobiographical memory, mainly in cases where the etiology is for hippocampal sclerosis (HS) Objective: Determine the possible impairments of autobiographical memory in patients with temporal lobe epilepsy by hippocampal sclerosis compared to healthy subjects. Materials and methods: The sample was composed by 25 patients diagnosed with TLE by HS using neuroimaging, and where contrasted with a control group composed by 15 healthy subjects. Patients who previously were evaluated by neurology and neuropsychology, performed the autobiographical memory interview to test the semantic personal memory performance and autobiographical incidents. In order to compare autobiographical memory in both groups, the U test from Mann Whitney was used and the size of the no parametric effect was calculated. Results: he patients presented difficulties remembering personal semantic information in the last 5 years and had relevant alterations remembering autobiographical incidents related to childhood, adulthood, and recent life. Conclusion: The results confirmed the difficulties of patients with TLE by HS to activate memories from the hippocampus for evoking and experimenting again detailed autobiographical incidents from their personal history.

Memoria autobiográfica en epilepsia del lóbulo temporal / Autobiographical memory in temporal lobe epilepsy

La epilepsia del lóbulo temporal (ELT) es un tipo de epilepsia focal que se caracteriza por crisis parciales complejas y secundariamente generalizadas; es una enfermedad de difícil control, es decir que no responde adecuadamente al manejo farmacológico. Otra característica es su comorbilidad con trastornos cognitivos secundarios a la frecuencia e intensidad de las crisis epilépticas, afectándose especialmente los procesos mnésicos. Es probable que el paciente con ELT tenga dificultades en la memoria autobiográfica (MA); sin embargo, la evaluación neuropsicológica que se realiza en este tipo de epilepsia, no refleja las quejas que el paciente refiere acerca de su MA, aspecto que altera su calidad de vida. En el presente artículo se exponen los modelos explicativos de la MA así como los métodos de evaluación más usados para este tipo de memoria y, finalmente, se revisan investigaciones acerca de la MA en pacientes con ELT.

Temporal lobe epilepsy (TLE) is a type of focal epilepsy that is mainly characterized by complex secondarily generated seizures. It is a difficult illness to control because it doesn't respond to pharmacological treatment. Another feature of this type of epilepsy is its comorbidity with cognitive disorders that mainly affect memory and depend on the frequency and intensity of seizures. Patients with TLE normally have problems with autobiographical memory (AM), especially in cases where the etiology is hippocampal sclerosis (HS). However, neuropsychological evaluations of this type of epilepsy do not reflect patient complaints about their autobiographical memory, a factor which affects quality of life. In this paper we present the explanatory models of RAM, set out the most common methods used to assess it, and finally research on AM for patients with TLE is revised.

Necrólisis epidérmica tóxica asociada a anticonvulsivantes: presentación de un caso en el Hospital Universitario de Santander, Bucaramanga, Colombia / Toxic epidermal necrolysis: case report at Hospital Universitario de Santander, Bucaramanga, Colombia

La necrólisis epidérmica tóxica es una patología de escasa ocurrencia, que se acompaña de mortalidad elevada y se caracteriza por lesiones cutáneas vesículo ampollosas que con frecuencia afecta la mucosa respiratoria, digestiva y ocular. Se presenta un caso de la enfermedad atendido en el Hospital Universitario de Santander en octubre del año 2007 desencadenado por el tratamiento con fenitoína – ácido valproico como terapia anticonvulsiva, con desenlace fatal y al cual se le practicó autopsia médico científica. Se pretende con este trabajo presentar una revisión del tema y analizar los factores relacionados con esta grave condición clínica...

Toxic epidermal necrolysis is an infrequent pathology, accompanied of high mortality risk in concordance with extension of comprised skin characterized for blisters. Frequently these are present in respiratory, digestive and ocular mucous. An autopsy case is presented occurred in Hospital Universitario de Santander in October 2007 of toxic epidermal necrolysis secondary to treatment with phenytoin associated with valproic acid as anticonvulsivant therapy for messial hippocampal sclerosis. It pretends with this work show a review and to analyze related factors with this condition...