Relationship of number of seizures recorded on video-EEG to surgical outcome in refractory medial temporal lobe epilepsy / Relação entre o número de crises epilépticas registradas em vídeo-EEG e o resultado cirúrgico na epilepsia refratária do lobo temporal

INTRODUCTION: Surgical planning for refractory medial temporal lobe epilepsy (rMTLE) relies on seizure localization by ictal electroencephalography (EEG). Multiple factors impact the number of seizures recorded. We evaluated whether seizure freedom correlated to the number of seizures recorded, and the related factors. METHODS: We collected data for 32 patients with rMTLE who underwent anterior temporal lobectomy. Primary analysis evaluated number of seizures captured as a predictor of surgical outcome. Subsequent analyses explored factors that may seizure number. RESULTS: Number of seizures recorded did not predict seizure freedom. More seizures were recorded with more days of seizure occurrence (p<0.001), seizure clusters (p<0.011) and poorly localized seizures (PLSz) (p=0.004). Regression modeling showed a trend for subjects with fewer recorded poorly localized seizures to have better surgical outcome (p=0.052). CONCLUSIONS: Total number of recorded seizures does not predict surgical outcome. Patients with more PLSz may have worse outcome.

INTRODUÇÃO: O planejamento cirúrgico para epilepsia refratária do lobo medial temporal (rMTLE) depende da localização da região de origem das convulsões por meio do eletroencefalografia (EEG) ictal. Múltiplos fatores podem influenciar o número de crises registradas. Neste artigo, avaliamos se a obtenção de liberdade de crises epilépticas no pós-operatório se relaciona com o número de crises epilépticas registradas durante a avaliação pré-operatória e os fatores que afetam tal resultado. MÉTODOS: Foram coletados dados de 32 pacientes com rMTLE que foram submetidos à lobectomia temporal anterior. A análise principal avaliou o número de convulsões captadas como fator preditivo do resultado cirúrgico, e as análises subsequentes exploraram outros fatores que podem ter afetado o resultado cirúrgico. RESULTADOS: O número de convulsões registradas não mostrou valor preditivo para resultados livres de crises. Foi registrado maior número de convulsões quando houve: maior número de dias em que ocorreram crises (p<0,001); salvas de convulsões (p<0,011); e localização subótima da origem das crises (PLSz) (p=0,004). O modelo de regressão mostrou tendência para os indivíduos com um menor número de crises pobremente localizadas terem um melhor desfecho cirúrgico (p=0,052). CONCLUSÕES: O número total de crises registrado não afeta o desfecho cirúrgico, que possivelmente é influenciado por múltiplos fatores. Pacientes com mais PLSz têm maior possibilidade de pior resultado cirúrgico.

Statistical voxel-wise analysis of ictal SPECT reveals pattern of abnormal perfusion in patients with temporal lobe epilepsy

OBJETIVO: Investigar o padrão de anormalidades perfusionais no SPECT de perfusão cerebral (SPC) ictal e interictal na epilepsia de lobo temporal (ELT). MÉTODO: Foram realizados SPCs ictal e interictal de 24 pacientes com ELT que foram analisados visualmente e com o statistical parametric mapping (SPM2). A análise estatística comparou o grupo de pacientes versus um grupo controle de 50 voluntários. RESULTADOS: Na análise do SPM não foram observadas diferenças significativas no grupo de SPC interictal. No grupo de SPC ictal o SPM revelou hiperperfusão no lobo temporal ipsilateral (foco epileptogênico) e também na região parieto-occipital contralateral, porção posterior do cíngulo ipsilateral, lobos occipitais e núcleos da base ipsilateral. O SPC ictal também mostrou áreas de hipoperfusão. CONCLUSÃO: Em uma análise de grupo do SPC ictal de pacientes com ELT, a análise baseada em voxel detecta uma rede de alteração perfusional em regiões distantes que pode ter uma função ativa na origem e propagação das crises.

Central neurocytoma: report of two cases

INTRODUÇÃO: Neurocitoma central é um tumor neuroectodérmico raro, geralmente localizado nos ventrículos laterais. RELATO DE CASOS: Uma mulher de 26 anos e um homem de 33 anos apresentaram-se com hipertensão intracraniana. Exames de imagem revelaram tumor intraventricular heterogêneo, que impregnava por contraste, ocupando os ventrículos laterais e causando hidrocefalia. A mulher faleceu no pós-operatório e o homem está livre de recidiva após três anos. HISTOPATOLOGIA: Ambos os tumores eram sólidos, com células arredondadas, lembrando oligodendroglia, positivas para sinaptofisina, cromogranina e NSE e algumas para GFAP, vimentina e proteína S-100. Microscopia eletrônica mostrou neurópilo entre os corpos celulares, mas sinapses eram raras.

Imaging features and treatment of an intradural lumbar cystic schwannoma

O schwannoma cístico intra-espinal é tumor muito raro e poucos casos estão descritos na literatura: são usualmente assintomáticos e somente diagnosticados quando atingem grande tamanho causando compressão radicular. Com o intuito de ilustrar as armadilhas existentes referentes ao diagnóstico e tratamento desse tipo de tumor, nós relatamos um caso raro, focando nos passos da investigação e terapêutica. É descrito o caso de um paciente de 55 anos que apresentava apenas queixas de dor lombar. A investigação revelou uma lesão cística extensa na região intradural lombar inferior. O tumor foi totalmente ressecado por técnica microneurocirúrgica, sendo a dura-máter reconstruída. O diagnóstico patológico e imuno-histoquímico evidenciou tratar-se de um schwannoma cístico. Neste artigo, nós procuramos enfatizar as características clínicas e tratamento de schwannomas lombares, ilustrando os achados imagenológicos desse caso incomum.

Long term follow-up in a patient with papillary glioneuronal tumor

Relatamos o caso de uma jovem paciente com um tumor cerebral raro e recentemente descrito. Essa paciente apresentou-se com queixas de cefaléia, hemiparesia e crises epiléticas parciais simples. Sua investigação revelou um tumor cerebral envolvendo os lobos frontal e parietal esquerdos. As imagens radiológicas mostraram uma massa cística com massas nodulares múltiplas e reforço anelar de contraste estendendo do córtex parietal direito aos ventrículo lateral e corpo caloso ipsilaterais. A paciente se submeteu à ressecção do tumor e a análise histológica da lesão revelou uma estrutura pseudopapilar formada por vasos delicados entremeados com um padrão fibrilar e emoldurada por intensa reação astrocítica com fibras de Rosenthal. Essas características correspondem a uma forma de neoplasia mista glial-neuronal recentemente descrita, o tumor papilar glioneuronal. A paciente está em seguimento desde a cirurgia sem evidência de recorrência tumoral, confirmando o comportamento benigno desse tipo de tumor.

Value of extent of hippocampal resection in the surgical treatment of temporal lobe epilepsy

OBJETIVO: A atrofia hipocampal unilateral é indicadora de bom prognóstico cirúrgico em pacientes com epilepsia do lobo temporal (ELT). Alguns pacientes, no entanto, não se tornam livres de crises após a cirurgia. Nós avaliamos se i) o EEG interictal e ii) a extensão da ressecção do hipocampo e da amígdala estão associados com resultado cirúrgico. MÉTODO: Trinta pacientes com ELT com atrofia hipocampal unilateral ou claramente assimétrica que se submeteram a tratamento cirúrgico foram avaliados quanto a variáveis clínicas pré-operatórias e anormalidades ao EEG interictal. A ressecção da amídala e do hipocampo foi avaliada pela ressonância magnética pós-operatória. Nós comparamos os pacientes livres de crises com os pacientes não livres de crises, e os pacientes com bom resultado cirúrgico (classes I e II de Engel) com os pacientes com resultado cirúrgico ruim. RESULTADOS: Houve associação significativa entre a extensão da ressecção do hipocampo e o resultado cirúrgico. As variáveis pré-operatórias e o EEG interictal não mostraram associação significativa com o resultado cirúrgico como demonstrado em outros estudos. CONCLUSAO: Houve associação entre a extensão de ressecção do hipocampo e o resultado cirúrgico. Ressecção incompleta do hipocampo atrófico pode explicar a maior parte das falhas no tratamento cirúrgico de pacientes com ELT devido à esclerose hipocampal unilateral.

Temporal lobe hypogenesis associated with arachnoid cyst in patients with epilepsy

OBJECTIVE: To determine the frequency of temporal lobe hypogenesis (TLH) associated with arachnoid cysts (AC) in patients with epilepsy. METHOD: We retrospectively revised 655 consecutive MRI scans from patients followed in our epilepsy clinic. We identified patients with temporal AC and then performed careful visual analysis in a workstation. Patients with evident expansive or destructive lesions were excluded. RESULTS: Only 4 (0.6 percent) patients had AC in the left temporal lobe, all associated with TLH. In addition, there were also ipsilateral dysgenetic characteristics in the ipsilateral hippocampus including abnormal shape and axis, and hyperintense T2 signal. In one patient this hippocampal abnormality was bilateral. CONCLUSION: AC with TLH was rarely found in our patients with epilepsy and it was always associated with hippocampal dysgenesis. Although volumetric reduction of the temporal lobe can be observed in patients with epilepsy and hippocampal abnormalities, the presence of adjacent AC points to a malformative etiology

Multiple systemic metastases of posterior fossa - primitive neuroectodermal tumor (PF-PNET) in adult. Case report

We present the case of a 30-year female patient with multiple systemic metastases of posterior fossa primitive neuroectodermal tumor (PF- PNET) and present a review concerning the usual presentation, sign and symptoms, radiological aspects, pathways of spread, genetic patterns and treatment of PF-PNET. The biological behavior of PF - PNET is analyzed taking into consideration the presence of systemic metastases

Bilateral internuclear ophthalmoplegia and clivus fracture following head injury: case report

Internuclear ophthalmoplegia is a remarkable finding, particularly in patients victims of head injury. The medial longitudinal fasciculus, which is believed to be lesioned in cases of internuclear ophthalmoplegia, has an unique brain stem position and the mechanism involved in brain stem contusions implies a maximal intensity of shearing forces on the skull base. We describe a very rare association of bilateral ophthalmoplegia and clivus fracture following head injury, without further neurological signs. The patient history, his physical examination and the image investigation provide additional evidence to some of the mechanisms of injury proposed to explain post-traumatic internuclear ophthalmoplegia

Risk factors and outcome in 100 patients with aneurysmal subarachnoid hemorrhage

OBJECTIVE: Clinical and surgical outcome of patients with subarachnoid hemorrhage (SAH) due to ruptured aneurysm were assessed in comparison to pre-operative data and risk factors such as previous medical history, clinical presenting condition, CT findings and site of bleeding. METHODS: We evaluated 100 consecutive patients with aneurysmal SAH. Gender, color, history of hypertension, smoking habit, site and size of aneurysm, admittance and before surgery Hunt Hess scale, need for cerebro-spinal fluid shunt, presence of complications during the surgical procedure, Glasgow Outcome Scale, presence of vasospasm and of rebleeding were assessed and these data matched to outcome. For statistical analysis, we applied the chi-squared test or Fisher's test using the pondered kappa coeficient. Kruskal-Wallis test was used for comparison of continue variables. Tendency of proportion was analyzed through Cochran-Armitage test. Significance level adopted was 5 percent. RESULTS: Patients studied were mainly white, female, without previous history of hypertension and non-smokers. Upon hospital admittance, grade 2 of Hunt-Hess scale was most frequently observed (34 percent), while grade 3 of Fisher scale was the most prevalent. Single aneurysms were most frequent at anterior circulation, between 12 and 24 mm. The most frequent Glasgow Outcome Scale observed was 5 (60 percent). Hunt Hess upon the moment of surgery and presence of complications during surgical procedure showed positive correlation with clinical outcome (p=0.00002 and p=0.001, respectively). Other variables were not significantly correlated to prognosis. Tendency of proportion was observed between Hunt-Hess scale and Fisher scale. CONCLUSION: Among variables such as epidemiological data, previous medical history and presenting conditions of patients with ruptured aneurysms, the Hunt-Hess scale upon the moment of surgery and the presence of surgical adversities are statistically related to degree of disability

Acute cervical epidural hematoma: case report

A 74 year-old patient with a nocturnal onset of neck and chest pain was brought to an emergency clinic. Physical examination and cardiac assessment were normal. Three hours after the addmittance, a flaccid paralysis of the four limbs supervened. Suspecting of an unusual onset of central nervous system infection, a lumbar puncture was performed, yielding 20 ml of normal cerebrospinal fluid. Thirty oinutes after the puncture, the patient completely regained neurological funcion. He was then referred to a General Hospital where a computed tomography (CT) scan was done showing a large cervical epidural bleeding in the posterolateral region of C4/C5 extending to C7/Th1, along with a C6 vertebral body hemangioma. A magnetic resonance imaging revealed the same CT findings. A normal selective angiography of vertebral arteries, carotid arteries and thyreocervical trunk was carried out. Spontaneous spinal epidural hematoma (ASSEH) is a rare but dramatic cause of neurological impairment. In this article we report a fortunate case of complete recovery after an unusual spine cord decompression. We also review the current literature concerning diagnosis and treatment of ASSEH

Pilocytic astrocytoma following radiotherapy for craniopharyngioma: case report

Administration of fractionated doses of irradiation is part of the adjutant therapy for CNS tumours such as craniopharyngiomas and pituitary adenomas. It can maximise cure rates or expand symptom-free period. Among the adverse effects of radiotherapy, the induction of a new tumour within the irradiated field has been frequently described. The precise clinical features that correlate irradiation and oncogenesis are not completely defined, but some authors have suggested that tumors are radiation induced when they are histologically different from the treated ones, arise in greater frequency in irradiated patients than among normal population and tend to occur in younger people with an unusual aggressiveness. In this article, we report a case of a papillary astrocytoma arising in a rather unusual latency period following radiotherapy for craniopharyngioma

Arachnoid cyst: adversity and plasticity

We report four cases of surgically treated intracranial arachnoid cysts, one with cyst-peritoneal shunt and three with craniotomy and arachnoid membrane resection. Their classification and etiopathogeny are discussed, and especially the different methods of treatment comparing the drastic complications (adversities) with the favorable solutions in severe clinical cases (plasticity) treated at our institution.

Pilonidal cyst on the vault: case report

Pilonidal cysts and sinuses are described as dermoid cysts which contain follicles of hairs and sebaceous glands. They clinically present as a classic case of inflammation which comes with pain, local infection and redness. The origin of pilonidal disease remains controverse. There are many hypothesis as lack of hygiene on the affected area and a penetration and growth of a hair in the subcutaneus tissue caused by constant friction or direct trauma on the damaged area. The option for clinical treatment is very frequent. However, taking into consideration the incidence and the possibility of recidive, surgical treatment is presently recommended. Complications include cellulitis and abscess formation. Pilonidal cysts are mostly found on the sacral region. In the literature is found description of pilonidal cysts on the penis, interdigital region on the hands as well as on the cervical region. We present a case of pilonidal cyst located on the vault biparietal region, without malignant degeneration.