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Continuous video electroencephalography (CEEG) monitoring of critically ill infants and children has expanded rapidly in recent years. Indications for CEEG include evaluation of patients with altered mental status, characterization of paroxysmal events, and detection of electrographic seizures, including monitoring of patients with limited neurological examination or conditions that put them at high risk for electrographic seizures (e.g., cardiac arrest or extracorporeal membrane oxygenation cannulation). Depending on the inclusion criteria and clinical characteristics of the population studied, the percentage of pediatric patients with electrographic seizures varies from 7% to 46% and with electrographic status epilepticus from 1% to 23%. There is also evidence that epileptiform and background CEEG patterns may provide important information about prognosis in certain clinical populations. Quantitative EEG techniques are emerging as a tool to enhance the value of CEEG to provide real-time bedside data for management and prognosis. Continued research is needed to understand the clinical value of seizure detection and identification of other CEEG patterns on the outcomes of critically ill infants and children.

A 7-year-old boy presented with acute-onset headache, vomiting, and confusion during summer. Two months previously, he developed right thigh pain, causing intermittent limping. Three days before admission, he developed headache; 1 day later, he experienced fatigue, nausea, and vomiting. On the day of presentation, symptoms included behavioral change (showered 15 times), unsteadiness, and new palmoplantar rash. He presented with confusion and lethargy and was transferred to our facility. His father had a recent gastrointestinal illness, but there were no other sick contacts. There were no recent weight changes, fever, tick/animal exposure, or travel. Past medical history included prior herpes simplex virus (HSV)–positive facial lesion (at 5 years old). The patient took no medications, had no known allergies, was developmentally normal, and was appropriately vaccinated. On general examination, he was somnolent and irritable, and had a palpable right thigh mass and palmar/solar petechiae. Neurologically, he was arousable to light touch, followed only simple midline commands, answered yes/no to orientation questions and responded to all naming questions with “I don't know.” Cranial nerves were intact. He had normal muscle bulk/tone and at least 3/5 strength throughout, but encephalopathy limited assessment. He had normal sensation to light touch and muscle stretch reflexes, neutral plantar responses, and no dysmetria. The patient sat in bed independently but refused to stand or walk.

BackgroundWe sought to define the radiologic features that differentiate neoplastic from non-neoplastic T2 hyperintensities (T2Hs) in neurofibromatosis type 1 (NF1) and identify those lesions most likely to require oncologic surveillance.MethodsWe conducted a single-center retrospective review of all available brain MRIs from 68 children with NF1 (n = 190) and 46 healthy pediatric controls (n = 104). All T2Hs identified on MRI were characterized based on location, border, shape, degree of T1 hypointensity, and presence of mass effect or contrast enhancement, and subsequently classified using newly established radiologic criteria as either unidentified bright objects (UBOs) or probable tumors. Lesion classification was pathologically confirmed in 10 NF1 cases.ResultsT2Hs were a highly sensitive (94.4%; 95% confidence interval [CI] 86.4%–98.5%) and specific (100.0%; 95% CI 92.3%–100.0%) marker for the diagnosis of NF1. UBOs constituted the majority of T2Hs (82%) and were most frequently located in cerebellar white matter, medial temporal lobe, and thalamus, where they were more likely than probable tumors to be bilateral (p < 0.001) and have nondiscrete borders (p < 0.001). Surprisingly, 57% of children with T2Hs harbored lesions classified as probable tumors, and 28% of children with probable tumors received treatment. In contrast to UBOs, probable tumors were most frequently located within the globus pallidus and medulla, and rarely occurred prior to 3 years of age.ConclusionsWith the implementation of standardized radiologic criteria, a high prevalence of brain tumors was identified in this at-risk population of children, of which nearly one-third required treatment, emphasizing the need for appropriate oncologic surveillance for patients with NF1 harboring nonoptic pathway brain tumors.

Nearly a third of patients with epilepsy have seizures refractory to current medical therapies. In the search for novel drug targets, the mTOR pathway has emerged as key in the regulation of neuronal function, growth and survival, and other cellular processes related to epileptogenesis. Hyperactivation of the mTOR pathway has been implicated in tuberous sclerosis complex and other ‘mTORopathies’, clinical syndromes associated with cortical developmental malformations and drug-resistant epilepsy. Recently published clinical trials of mTOR inhibitors in tuberous sclerosis complex have shown that these drugs are effective at decreasing seizure frequency. Future studies may establish whether mTOR inhibitors can provide effective treatment for patients with diverse genetic and acquired epilepsies, including preventative, disease-modifying therapies.

To characterize the adaptive behavior profile of children with neurofibromatosis type 1 (NF1) and determine its relationship to neuropsychological functioning and non-neoplastic T2-weighted hyperintense brain lesions on brain magnetic resonance imaging (MRI).In this cross-sectional study, we retrospectively reviewed neuropsychological reports from 104 children with NF1 (56 males, 48 females; mean age 10y 4mo; standard deviation [SD] 3y 4mo; range 3y 5mo-17y 6mo), and extracted data from a range of cognitive and behavioral measures, including the Adaptive Behavior Assessment System (ABAS). Brain MRI was retrospectively reviewed in 42 individuals.Adaptive Behavior Assessment System scores were continuously distributed and pathologically shifted by 0.79 to 1.26SD across Conceptual, Social, and Practical domains, and 46.5% of individuals had a composite score in the borderline or impaired range. Impairment in adaptive functioning was correlated with deficits in executive function (r=-9.543, p0.001), externalizing problems (r=-0.366, p0.001), and attention (r=-9.467, p=0.001). Cluster analysis revealed three distinct phenotypic subgroups, one of which exhibited normal cognitive ability, but impaired adaptive functioning, with persistent deficits in executive function, behavioral problems, and attention-deficit/hyperactivity disorder symptomatology. There was no relationship between ABAS scores and the number or location of unidentified bright objects.Adaptive functioning deficits are common among children with NF1 and are associated with impairment in other cognitive/behavioral domains, independent of general cognitive ability.Deficits in adaptive behavior are common in children with neurofibromatosis type 1 (NF1). Poor adaptive functioning is associated with impairments in executive function, externalizing behaviors, and attention, regardless of cognitive ability. The presence or location of unidentified bright objects do not predict adaptive behavior skills in children with NF1.FUNCIONAMIENTO ADAPTATIVO EN NIÑOS CON NEUROFIBROMATOSIS TIPO 1: RELACIÓN ENTRE COGNICIÓN, COMPORTAMIENTO E IMÁGENES DE RESONANCIA MAGNÉTICA: OBJETIVO: Caracterizar el perfil del comportamiento adaptativo de niños con neurofibromatosis tipo 1 (NF1) y determinar la relación entre el funcionamiento neuropsicológico y las lesiones hiperintensas cerebrales no neoplásicas en T2-pesado de la resonancia magnética cerebral (RM). MÉTODO: En este estudio transversal, revisamos de forma retrospectiva reportes neuropsicológicos de 104 niños con NF1 (56 varones, 48 mujeres, media de edad 10 años 4 meses; desviación estándar (DE) 3 años 4 meses; rango 3 años 5 meses a 17 años 6 meses), y se extrajeron datos de una serie de mediciones cognitivas y conductuales, incluyendo el test sistema de evaluación de la conducta adaptativa (Adaptative Behaivor Assesment System ABAS). Se revisaron 42 RM cerebrales de forma retrospectiva. RESULTADOS: Los resultados ABAS fueron continuamente distribuidos y se cambiaron patológicamente entre 0,79 a 1,26 DE en los dominios de lo conceptual, social y práctico, y 46,5 por ciento de los individuos tuvieron un puntaje limítrofe o sin afectación. La afectación en las funciones adaptativas fue correlacionada con los déficits en funciones ejecutivas (r = -9,543, p 0,001), externalizar problemas (r = -0,366, p 0,001), y atención (r = -9,467, p = 0,001). El análisis de grupo revelo tres subgrupos fenotípicos distintos, uno de ellos exhibía una habilidad cognitiva tipica, pero afectación en el funcionamiento adaptativo, con déficits persistentes en función ejecutiva, problemas conductuales, y sintomatología de déficit de atención/hiperactividad. No hubo relación entre el puntaje ABAS y el número o localización de imágenes brillantes no identificadas en la RM cerebral. INTERPRETACIÓN: Los déficits de funcionamiento adaptativo son comunes entre niños con NF1 y son asociados con afectación de otros dominios cognitivo/conductual, independiente de la habilidad cognitiva en general.FUNCIONAMENTO ADAPTATIVO EM CRIANÇAS COM NEUROFIBROMATOSE TIPO 1: RELAÇÃO COM COGNIÇÃO, COMPORTAMENTO, E IMAGEM DE RESSONÂNCIA MAGNÉTICA: OBJETIVO: Caracterizar o comportamento adaptativo de crianças com neurofibromatose tipo 1 (NF1) e determinar sua relação com funcionamento neuropsicológico e lesões em T2 hiperintensas não neoplásticas ao exame de ressonância magnética (RM). MÉTODO: Neste estudo transversal, revisamos retrospectivamente os relatórios neuropsicológicos de 104 crianças com NF1 (56 do sexo masculino, 48 do sexo feminino; média de idade 10a 4m; desvio padrão [DP] 3a 4m; variação 3a 5m-17a6m), e extraímos dados de uma variedade de medidas cognitivas e comportamentais, incluindo o Sistema de Avaliação do Comportamento Adaptativo (SACA). Imagens de RM cerebral foram retrospectivamente revisadas em 42 indivíduos. RESULTADOS: Os escores SACA foram distribuídos continuamente, e patologicamente deslocados em 0,79 a 1,26 DP nos domínios Conceitual, Social e Prático, e 46,5 por cento dos indivíduos tiveram escore composto na faixa limítrofe ou deficiente. Deficiências no comportamento adaptativo se correlacionaram com déficits na função executiva (r = −9,543, p 0,001), problemas externalizantes (r = −0,366, p 0,001), e atenção (r = −9,467, p = 0,001). Análise agrupada revelou três subgrupos genotípicos distintos, um dos quais exibiu capacidade cognitiva normal, mas funcionamento adaptativo deficiente, e sintomatologia de transtorno de deficit de atenção e hiperatividade. Não houve relação entre escores SACA e o número ou localização de objetos luminosos não identificados. INTERPRETAÇÃO: Déficits no funcionamento adaptativo são comuns entre crianças com NF1 e são associados com deficiência em outros domínios cognitivos/comportamentais, independente da capacidade cognitiva geral.