Prevalence of interictal psychiatric disorders in patients with refractory temporal and extratemporal lobe epilepsy in Spain. A comparative study

We aim to investigate whether temporal origin of epilepsy increases the risk of developing a psychiatric disorder and more specifically a major depressive disorder. The lack of standardized diagnostic instruments and the methodologic differences between studies highlight the fact that this issue warrants further, systematic, study. Three‐hundred eight patients with complex partial seizures were classified according to temporal or extratemporal origin, following the Commission on Classification and Terminology of the International League Against Epilepsy (ILAE), 1989 localization‐related concept. All patients were assessed using the Structured Interview for DSM‐IV axis I psychiatric disorders (SCID‐I). Lifetime and previous‐year prevalence of psychiatric disorders were compared in temporal and extratemporal subgroups, using multivariate analysis. Previous‐year major depression was significantly associated with temporal lobe origin. Our results do not support the hypothesis that patients with temporal lobe epilepsy (TLE) have more psychiatric illness in general, although they do suggest a specific connection between TLE and major depression.     

伽玛刀治疗颞叶癫痫伴精神障碍的疗效分析

目的探讨伽玛刀对颞叶癫痫伴精神障碍的治疗效果。方法回顾分析伽玛刀治疗26例颞叶癫痫伴精神障碍的结果,根据临床特点、PET-CT、EEG进行致痫灶定位,应用MASEP-SRRS型旋转式伽玛刀治疗,单纯以杏仁核和海马为靶点时,边缘剂量25～30Gy,等剂量曲线50%,需加照射颞叶皮层致痫灶时,边缘剂量9～14Gy,等剂量曲线45%～50%。采用癫痫的国内疗效评定标准和全国精神外科疗效评定标准进行疗效评定。结果治疗后随访1～6年,26例中,癫痫控制满意9例,显著改善8例,良好5例,有效率84.6%。治疗后精神症状疗效评定:恢复3例,显著进步12例,进步6例,无效5例,总有效率80.8%。结论伽玛刀行杏仁核海马毁损术及联合皮层癫痫灶低剂量照射,对颞叶癫痫伴精神障碍具有明确的疗效,并发症少见。     

Interictal depression, anxiety, personality traits, and psychological dissociation in patients with temporal lobe epilepsy (TLE) and extra-TLE

PURPOSE: This study was performed to investigate the relation between symptoms of interictal depression, anxiety, personality traits, and psychological dissociation with the localization and lateralization of the epileptogenic zone in patients with partial epilepsy. METHODS: All patients were diagnosed according to the localization-related concept of the 1989 International League Against Epilepsy (ILAE) Classification of Epilepsies and Epileptic Syndromes, and the localization and lateralization of the epileptogenic zone was established by using the clinical criteria for noninvasive presurgical evaluation. This resulted in 67 patients with temporal lobe epilepsy (TLE) and 64 patients with extra-TLE. All patients were assessed on the various aspects of psychopathology by using a comprehensive battery of standardized diagnostic instruments. RESULTS: We did not find the hypothesized excess of psychiatric symptoms in patients with (mesial) TLE in comparison with patients with extra-TLE. We also found no differences between patients with the lateralization of epilepsy in the left versus the right hemisphere. CONCLUSIONS: TLE per se cannot be considered a risk factor in developing more or more severe symptoms of psychopathology in patients with partial epilepsy. Concomitant factors, such as the duration of epilepsy, seizure frequency, and frontal lobe dysfunction may play an additional role. Our findings support the hypothesis of a multifactorial explanation for the psychiatric symptoms in patients with epilepsy.     

A controlled prospective investigation of psychiatric comorbidity in temporal lobe epilepsy

Temporal lobe epilepsy patients (n = 48) and healthy controls (n = 69) underwent structured psychiatric interview at baseline and 4 years later to characterize the course of DSM-IV Axis I disorders. Adjusting for the influence of prior psychiatric history, epilepsy subjects exhibit significantly greater risk of interval episodes of Total Axis I Disorders and Mood Disorders, indicating a poorer prognosis for these comorbidities in the context of chronic temporal lobe epilepsy.     

A comparative study of obsessive–compulsive disorder and other psychiatric comorbidities in patients with temporal lobe epilepsy and idiopathic generalized epilepsy

Our aim was to assess the associations of temporal lobe epilepsy (TLE) and idiopathic generalized epilepsy (IGE) with comorbid psychiatric conditions, especially obsessive–compulsive disorder (OCD), in a comparative design. We evaluated 29 patients with TLE, 27 patients with IGE, and 30 healthy controls. The Structured Clinical Interview for DSM-IV (SCID), Yale–Brown Obsessive Compulsive Scale (Y-BOCS) Symptom Checklist, and Beck Depression Inventory (BDI) were administered. Among patients with TLE, 75.9%, and among patients with IGE, 48.1% had at least one Axis I psychiatric disorder. Clinically meaningful obsessive–compulsive symptoms (CM-OCS) were noted in 10 patients with TLE and in 3 patients with IGE, and this difference was statistically significant (P < 0.05). CM-OCS were present in 9 of 18 patients with left-sided TLE, but in only 1 of 11 patients with right-sided TLE. Higher comorbidity in TLE suggests that involvement of the temporal lobe may play a role in the development of specific psychopathological syndromes.     

Surgery for pharmacoresistant epilepsy in the developing world: A pilot study

Epilepsy prevalence in the developing world is many fold that found in developed countries. For individuals whose conditions failed to respond to pharmacotherapy, surgery is the only opportunity for cure. In Uganda, we developed a center for treatment of intractable temporal lobe epilepsy (iTLE) that functions within the technologic and expertise constraints of a severely low resource area. Our model relies on partnership with epilepsy professionals and training of local staff. Patients were prescreened at regional clinics for iTLE. Individuals meeting inclusion criteria were referred to the treating Ugandan hospital (CURE Children's' Hospital of Uganda, CCHU) for video-EEG (electroencephalography), computed tomography (CT) imaging, and neuropsychological evaluation. Data were transferred to epilepsy experts for analysis and treatment recommendations. Ten patients were diagnosed with iTLE and surgically treated at CCHU. Six (60%) were seizure free, and there was no neurologic morbidity or mortality. Our model for surgical treatment of pharmacoresistant TLE has functioned successfully in a true developing world low resource setting.     

Psychoses of epilepsy: a study comparing the clinical features of patients with focal versus generalized epilepsies

In the literature, psychosis of epilepsy (POE) has been described as one of the most frequent psychiatric comorbidities of epilepsy, occurring particularly in association with temporal lobe epilepsy. However, the presence of such psychiatric disorders among patients with idiopathic generalized epilepsies has also been mentioned. In this study, we evaluated the clinical features of psychotic disorders in a series of patients with temporal lobe epilepsy related to mesial temporal sclerosis (TLE-MTS) and juvenile myoclonic epilepsy with the aim of describing and comparing the clinical patterns of the psychotic symptoms in such frequent and important epilepsy syndromes. POE occurred most frequently in patients with TLE-MTS (P=0.01), but no differences were observed between the groups with respect to the subtypes and core symptoms of psychoses. The clinical implications of POE in both epilepsy syndromes are discussed.     

A prospective case control study of psychiatric disorders in adults with epilepsy and intellectual disability

Purpose: No study to date has prospectively investigated the impact of epilepsy on psychiatric disorders among adults with an intellectual disability (ID). This study aimed to determine prospectively the influence of epilepsy on the development of psychiatric disorders in adults with ID. Method: Psychiatric symptoms were measured prospectively over a 1‐year period among 45 adults with ID and active epilepsy and 45 adults with ID without epilepsy, matched on level of ID. The 1‐year incidence rate (IR) of commonly occurring Axis 1 psychiatric disorders was compared with and without controlling for possible confounding factors. Total psychiatric symptom scores over the period were compared between the two groups using repeated‐measures analysis of covariance. Key Findings: Adults with epilepsy and ID had a more than seven times increased risk for developing psychiatric disorders, particularly depression and unspecified disorders of presumed organic origin, including dementia, over a 1‐year period compared to those with ID only. Comparison of the psychiatric scores showed the epilepsy group to have significantly higher unspecified disorder and depression symptom scores. Significance: The findings point to an increased risk of depression and unspecified disorders, including dementia, among adults with ID and epilepsy. Further exploration of the nature and treatment of these unspecified disorders may help the care of people with epilepsy and ID.     

Personality disorders as predictors of severe postsurgical psychiatric complications in epilepsy patients undergoing temporal lobe resections

Purpose. Psychiatric disorders emerging after temporal lobe resections are a serious problem threatening the surgical success of patients with epilepsy. The present study aims to find psychiatric predictors that would indicate patients’ risk to developing severe psychiatric complications after surgery.Methods. One hundred adult patients who had temporal lobe resections were followed prospectively over 2 years. Preoperative psychiatric diagnoses and postoperative development of the patients were documented. As a criterion of severe postoperative complication, admission to a psychiatric hospital was chosen.Results. Patients with personality disorders are at higher risk of suffering from postoperative psychiatric complications as compared with patients with other preoperative psychiatric conditions (such as depression) or with patients with no preoperative psychiatric diagnosis whatsoever.Conclusions. Personality disorders are caused by organic dispositions and negative environmental influence. They indicate a high mental vulnerability and compromise the brain’s ability to combat stress. As a consequence patients with personality disorders are prone to suffer from severe psychiatric complications after epilepsy surgery. To minimize the negative influence of personality disorders in the process of surgical interventions, psychotherapeutic efforts are needed to reduce perisurgical stress factors and to strengthen the self-efficacy and social skills of these patients.     

What is the current evidence on decision-making after referral for temporal lobe epilepsy surgery?: A review of the literature

OBJECTIVES: Many patients thought to have temporal lobe epilepsy, are evaluated for surgical treatment. Decision-making in epilepsy surgery is a multidisciplinary, phased process involving complex diagnostic tests. This study reviews the literature on the value of different tests to decide on whether to operate. METHODS: Articles were selected when based on the consensus decision whether to perform temporal lobe surgery, or on the consensus localization or lateralization of the epileptic focus. The articles were scrutinized for sources of bias as formulated in methodological guidelines for diagnostic studies (STARD). RESULTS: Most studies did not fulfill the criteria, largely because they addressed prognostic factors in operated patients only. Ten articles met our inclusion criteria. In most articles, a single test was studied; SPECT accounted for five papers. Unbiased comparison of the results was not possible. CONCLUSION: Surprisingly little research in epilepsy surgery has focused on the decision-making process as a whole. Future studies of the added value of consecutive tests are needed to avoid redundant testing, enable future cost-efficiency analyses, and provide guidelines for diagnostic strategies after referral for temporal lobe epilepsy surgery.     

影响颞叶癫痫预后相关因素分析

目的研究颞叶癫痫患者病史、脑电图、头颅影像学资料等与其预后的关系。方法回顾分析我院确诊的99例颞叶癫痫患者病史、头颅影像学资料、发作间期脑电图资料、药物疗效,依据药物疗效分为难治性癫痫组46例,非难治性癫痫组53例,比较两组间差异。结果比较两组间差异发现:头颅MRI异常(χ2=7.55,P<0.01)、发作间期脑电图(electroencephalogram,EEG)反复异常(χ2=8.21,P<0.01)、初发年龄小(Z=-3.81,P<0.01)、病程长(Z=-4.41,P<0.01)与难治性颞叶癫痫有关。结论头颅MRI异常、发作间期EEG反复异常、初发年龄小、病程长为颞叶癫痫预后的不良因素。     

Psychotic disorders in Argentine patients with refractory temporal lobe epilepsy: A case–control study

The issue of psychotic disorders in epilepsy has given rise to great controversy among professionals; however, there are not many studies in this area and the physiopathological mechanisms remain unknown. The aim of this study was to describe the spectrum of psychotic disorders in an Argentine population with refractory temporal lobe epilepsy (RTLE) and to determine the risk factors associated with psychotic disorders. Clinical variables of the epileptic syndrome were compared among a selected population with RTLE with and without psychotic disorders (DSM-IV/Ictal Classification of psychoses). Logistic regression was performed. Sixty-three patients with psychotic disorders (Psychotic Group, PG) and 60 controls (Control Group, CG) were included. The most frequent psychotic disorders were brief psychotic episodes (35%) (DSM-IV) and interictal psychosis (50%) (Ictal Classification). Risk factors for psychotic disorders were bilateral hippocampal sclerosis, history of status epilepticus, and duration of epilepsy greater than 20 years.     

Depression in temporal lobe epilepsy before epilepsy surgery

PURPOSE: This study examined the association of depression with laterality of epilepsy surgery in patients with temporal lobe epilepsy before standard lobectomy. METHODS: Forty-nine patients presented for EEG telemetry for localization of epilepsy and eventual temporal lobectomy. Patients underwent routine neuropsychiatric evaluation blinded for epileptic focus, including ratings on depression. Patients were grouped according to right (n = 25, M = 10/F = 15) and left (n = 24, M = 13/F = 11) temporal lobectomy. Analysis of variance included side of surgery as grouping variable and sex, general depressive, cognitive depressive, and vegetative depressive symptoms as dependent variables. Chi2 analyses included categoric variables of sex, handedness, education, neuropathologic findings, and current affective disorders. t Tests were performed on variables of age, epilepsy duration, and cognitive function. RESULTS: Right and left temporal epilepsy groups did not differ with regard to sex, handedness, age, duration of epilepsy, education, cognitive function, and neuropathology. Patients with right temporal epilepsy rated higher on general, cognitive. and vegetative depression scores. Women scored higher on general, cognitive, and vegetative depression scores. Current affective disorders were more common in the right temporal epilepsy group. CONCLUSIONS: Depression ratings and diagnoses were more prominent in patients with right temporal lobe epilepsy and in women in particular. The strength of this laterality finding lies in the selection of patients, as all underwent epilepsy surgery. The finding on gender difference partly reflects the higher incidence of depression in women and needs further exploration. The laterality finding contrasts with recent findings in epilepsy, stroke, and trauma that associate depression with left hemispheric lesions. However, our results are consistent with findings in electrically hyperactive lesions such as gelastic and dacrystic epilepsy.     

A new locus for autosomal dominant generalized epilepsy associated with mild mental retardation on chromosome 3p

Purpose: Generalized epilepsies are clinically and genetically heterogeneous syndromes. Idiopathic generalized epilepsy (IGE), which has a strong genetic background, is not associated with any additional clinical features, such as mental retardation (MR). Herein we report results of linkage analysis in a large family with autosomal dominant (AD) generalized epilepsy associated with MR. Methods: We identified a four‐generation kindred with several affected members with generalized epilepsy without any evidence for secondary causes. Electroencephalography (EEG) studies and magnetic resonance imaging (MRI) results were reviewed when available. We performed a genome‐wide linkage analysis. Key Findings: Fourteen individuals were classified as affected and an additional three were considered as nonpenetrant obligatory carriers. Thirteen affected individual had a history of generalized tonic–clonic seizures, and absence seizures were reported in nine affected individuals. There was no history of preceding febrile seizures. MR was present in nine affected individuals with epilepsy but the other affected individuals had normal intelligence. Neuroimaging did not reveal any structural abnormalities and EEG studies were consistent with IGE rather than symptomatic generalized epilepsy. Genetic analysis detected a group of markers with logarithmic (base 10) of odds (LOD) score >3 on chromosome 3p spanning a 5.5 Mbp region. Sequencing of several candidate genes, including dynein light chain‐A, golgin subfamily a4, leucine rich repeat (in FLII) interacting gene, serine/threonine‐protein kinase DCAMKL3 (doublecortin‐ like and CAM kinase‐like 3), laforin (EPM2A) interacting protein 1 (EPM2AIP1, programmed cell death 6 interacting protein, and CLIP‐associating protein 2 (cytoplasmic linker‐associated protein 2) (hOrbit2) genes did not identify the disease‐causing mutations. Significance: We report the identification of a genetic locus for generalized epilepsy associated with MR on chromosome 3p. Affected individuals have a form of genetic epilepsy with generalized seizures variably associated with MR. Despite the presence of MR in several affected patients, epilepsy phenotype was not fully consistent with symptomatic epilepsy and suggests a biologic continuum between symptomatic epilepsies and IGE.     

海马硬化与颞叶癫痫术前定位探讨(附12例报告)

目的　探讨对顽固性颞叶癫痫的术前定位方法。方法　将 Ｍ Ｒ 对海马硬化的诊断作为一重要参考指标与 Ｅ Ｅ Ｇ 检查相结合,对１２ 例顽固性颞叶癫痫进行术前定位诊断,并与术中皮层 Ｅ Ｅ Ｇ 检查结果和术后随访结果比较。结果　 Ｍ Ｒ 检查发现９ 例海马硬化,皮层 Ｅ Ｅ Ｇ 证实有同侧颞叶内侧放电,行选择性海马杏仁核切除术后病理证实海马硬化;未发现海马硬化改变３ 例行前颞叶切除术。随访０５ ～２ 年,疗效满意。结论　 Ｅ Ｅ Ｇ 是诊断颞叶癫痫的最重要手段, Ｍ Ｒ 发现海马硬化对致痫灶定位有重要意义。     

A population-based study on epilepsy in mentally retarded children

PURPOSE: This study presents data on cumulative risk of seizures, cause, comorbidity, and remission of epilepsy among mentally retarded (MR) children followed until the age of 22 years. METHODS: A total of 151 MR children were identified at the age of 8 or 9 years by screening four birth cohorts of 12,882 children born from 1969 to 1972 in the Finnish province of Kuopio. Information about epilepsy was gathered longitudinally when children were 9 to 10, 17, and 22 years old. The guidelines for epidemiological studies on epilepsy proposed by the International League Against Epilepsy were followed. RESULTS: By the age of 10 years, 29 of the 151 MR children (19%) had epilepsy. The cumulative risk for epilepsy at 22 years was 21%. The probability of developing epilepsy was increased fivefold in severely MR children compared with mildly MR children, i.e., in 27 of the 77 severely MR children (35%) versus 5 of the 74 mildly MR children (7%). Postnatal causes of mental retardation or association with cerebral palsy increased the risk for epilepsy, especially in the mildly MR children. When these risk factors were not present, the mildly MR children exhibited only a 3% risk for epilepsy, whereas the respective risk was about 10-fold in severe mental retardation. The cumulative probability of epilepsy being in remission for 5 years by the age of 22 was 32%. CONCLUSIONS: The cumulative risk of epilepsy varies according to the severity and the cause of the retardation as well as the presence of additional disabilities. The cumulative probability of epilepsy remission tended to increase with age.     

Depression in temporal lobe epilepsy surgery patients: an FDG-PET study

PURPOSE: Depression is common in temporal lobe epilepsy (TLE) and after temporal lobectomy, and its etiology is obscure. In nonepileptic depression (including depression associated with other neurologic disorders), a consistent PET imaging finding is frontal lobe hypometabolism. Many TLE patients have hypometabolism involving frontal regions. Thus in data available from routine clinical assessments in an epilepsy surgery unit, we tested the hypothesis that the pattern of hypometabolism, particularly in the frontal lobe, may be associated with the depression seen in patients with TLE and TLE surgery. METHODS: We studied 23 medically refractory TLE patients who underwent anterior temporal lobectomy and who had preoperative FDG-PET scanning. All patients had pre- and postoperative psychiatric assessment. By using statistical parametric mapping (SPM-99), patterns of hypometabolism were compared between patients who had a preoperative history of depression (n=9) versus those who did not (n=14) and between those in whom postoperative depression developed (n=13) versus those in whom it did not (n=10). A significant region of hypometabolism was set at p<0.001 for a cluster of >or=20 contiguous voxels. RESULTS: Patients with a history of depression at any time preoperatively showed focal hypometabolism in ipsilateral orbitofrontal cortex compared with those who did not (t=4.64; p<0.001). Patients in whom depression developed postoperatively also showed hypometabolism in the ipsilateral orbitofrontal region (t=5.10; p<0.001). CONCLUSIONS: Although this study is methodologically limited, and other explanations merit consideration, orbitofrontal cortex dysfunction, already implicated in the pathophysiology of nonepileptic depression, may also be relevant to the depression of TLE and temporal lobectomy.     

Temporal lobe epilepsy surgery and the quest for optimal extent of resection: a review

The efficacy of surgery to treat drug-resistant temporal lobe epilepsy (TLE) has been demonstrated in a prospective randomized trial. It remains controversial which resection method gives best results for seizure freedom and neuropsychological function. This review of 5 3 studies addressing extent of resection in surgery for TLE identified seven prospective studies of which four were randomized. There is considerable variability between the intended resection and the volumetrically assessed end result. Even leaving hippocampus or amygdalum behind can result in seizure freedom rates around 50%. Most authors found seizure outcome in selective amygdalohippocampectomy (SAH) to be similar to that of lobectomy and there is considerable evidence for better neuropsychological outcome in SAH. Studies varied in the relationship between extent of mesial resection and seizure freedom, most authors finding no positive correlation to larger mesial resection. Electrophysiological tailoring saw no benefit from larger resection in 6 of 10 studies. It must be concluded that class I evidence concerning seizure outcome related to type and extent of resection of mesial temporal lobe structures is rare. Many studies are only retrospective and do not use MRI volumetry. SAH appears to have similar seizure outcome and a better cognitive outcome than TLR. It remains unclear whether a larger mesial resection extent leads to better seizure outcome.