Adult-onset idiopathic opsoclonus-myoclonus syndrome / Síndrome de opsoclonia-mioclonia idiopática de início adulto

ABSTRACT Purpose: Opsoclonus-myoclonus syndrome is extremely uncommon in adults with an autoimmune pathophysiology. Because of the rarity of the syndrome, international recognition of opsoclonus-myoclonus-ataxia syndrome needs to be improved urgently. Therefore, the goal of this study was to raise the awareness of the opsoclonus-myoclonus-ataxia syndrome and help doctors in better diagnosing and using immunotherapy. Methods: We present a case study of an adult-onset case of idiopathic opsoclonus-myoclonus syndrome characterized by spontaneous arrhythmic multidirectional conjugate eye movements, myoclonus, ataxia, sleep disorders, and intense fear. Additionally, we conduct a literature search and summarize the pathophysiology, clinical presentation, diagnosis, and treatment of opsoclonus-myoclonus-ataxia syndrome. Results: Immunotherapies successfully treated the patient's opsoclonus, myoclonus, and ataxia. Further, the article also includes an update summary of the opsoclonus-myoclonus-ataxia syndrome. Conclusion: The prevalence of residual sequela in adults with opsoclonus-myoclonus-ataxia syndrome is low. Early diagnosis and treatment may result in a better prognosis. Furthermore, combined immunotherapy is expected to reduce the incidence of refractory and reoccurring opsoclonus-myoclonus-ataxia syndrome.

RESUMO Objetivo: A síndrome de opsoclonia-mioclonia é extremamente rara em adultos e tem uma fisiopatologia autoimune. Devido à raridade dessa síndrome, o reconhecimento da síndrome de opsoclonia-mioclonia-ataxia precisa melhorar urgentemente em todo o mundo. Assim sendo, este estudo visou aumentar a conscientização sobre a síndrome de opsoclonia-mioclonia-ataxia e ajudar os médicos para um melhor diagnóstico e o uso correto da imunoterapia. Métodos: Este é o relato de um caso adulto de síndrome de opsoclonia-mioclonia idiopática com movimentos oculares conjugados, multidirecionais, arrítmicos e espontâneos, mioclonia, ataxia, distúrbios do sono e medo intenso. Além disso, foram pesquisadas as publicações recentes relevantes e resumiu-se a fisiopatologia, a apresentação clínica, o diagnóstico e o tratamento da síndrome de opsoclonia-mioclonia-ataxia. Resultados: A paciente recuperou-se totalmente da opsoclonia, da mioclonia e da ataxia através de imunoterapia. O artigo também fornece um resumo atualizado sobre a síndrome de opsoclonia-mioclonia-ataxia. Conclusão: Adultos com síndrome de opsoclonia-mioclonia-ataxia têm uma baixa frequência de sequelas residuais. O diagnóstico e o tratamento precoces podem levar a melhores prognósticos. Espera-se que a imunoterapia combinada reduza a incidência da síndrome de opsoclonia-mioclonia-ataxia refratária e recorrente.

Síndrome de opsoclonia mioclonia idiopático: Reporte de caso en una paciente de 13 meses / Idiopathic opsoclonus myoclonus syndrome: Case report in a 13-month-old female patient

Resumen El síndrome de opsoclonia mioclonía es una entidad neurológica poco frecuente que afecta a los niños en la etapa preescolar. Clínicamente se caracteriza por una triada clásica de opsoclonía, mioclonía y ataxia aguda, con una evolución progresiva o incluso de manera incompleta. Su etiología puede ser paraneoplásica, en la mayoría de los casos en asociación con neuroblastomas, así como postinfecciosa o parainfecciosa, autoinmune o idiopática. En objetivo del tratamiento es la inmunomodulación con terapia de primera línea con esteroides endovenosos aunque pudiendo asociarse a recaídas y secuelas a largo plazo en el ámbito neurológico y conductual. El síndrome de opsoclonia mioclonía representa un reto diagnóstico en los pacientes con ataxia aguda dada la variedad de presentación clínica, por tanto es importante tener una alta sospecha diagnostica para garantizar un tratamiento oportuno y evitar secuelas futuras.

Abstract Opsoclonus myoclonus syndrome is a rare neurological entity affecting preschool children. Clinically it is characterized by a classic triad of opsoclonus, myoclonus, and acute ataxia, with a progressive or even incomplete course. Its etiology can be paraneoplastic, in most cases in association with neuroblastomas, as well as postinfectious or parainfectious, autoimmune or idiopathic. The goal of treatment is immunomodulation with first-line therapy with intravenous steroids, although it can be associated with relapses and long-term neurological and behavioral sequelae. The opsoclonus myoclonus syndrome represents a diagnostic challenge in patients with acute ataxia given the variety of clinical presentations, therefore it is important to have a high diagnostic suspicion to ensure timely treatment and aoid future sequelae.

Recommendations for Neuroblastoma Associated Opsoclonus-myoclonus-ataxia Syndrome in Childhood / 罕见病研究

@#Opsoclonus-myoclonus-ataxia syndrome(OMAS) is a rare neurological disorder. This disease is often associated with neuroblastoma(NB). OMAS and neuroblastoma in children in China are treated separately by neurology, medical and surgical oncology. In this group of children, NB usually has a good prognosis, while OMAS is prone to sequelae, but the lack of standardized evaluation and follow-up is not conducive to the diagnosis and treatment of the disease. In this study, experts from multidisciplinary fields worked together to develop recommendations for the diagnosis, treatment and follow-up of NB associated OMAS in children, hoping to improve the prognosis of children through standardized management of this group of children.

Clinical diagnosis and treatment of 9 childhood opsoclonus-myoclonus syndrome patients and application of standard rating scale / 中华神经科杂志

Objective:To summarize the clinical features of childhood opsoclonus-myoclonus syndrome (OMS), evaluate severity degree and prognosis using OMS Symptom Severity Standard Rating Scale.Methods:The clinical features,diagnosis, therapeutic regimen and follow-up of 9 children with OMS in Department of Neurology and Oncology Department of Children's Hospital of Fudan University between 2011 and 2019 were retrospectively reviewed. Severity degree and prognosis were evaluated using OMS Symptom Severity Standard Rating Scale.Results:Among the 9 children with OMS, 4 were males and 5 were females. The onset age ranged from 14 months to 5 years, with a median of 17 months. Main symptoms were opsoclonus, myoclonus, ataxia, motor function regression, behavior and mood changes and sleep disorders. Eghit patients were combined with tumor. Seven of them with neuroblastoma were confirmed by surgical pathology, the other one showed spontaneous regression and symptom remission without treatment. Eight patients received hormone combined with intravenous immunoglobulin, of which 3 cases received adrenocorticotropic hormone, while 5 cases received methylprednisolone pulse therapy, with prednisone sequential therapy, decreasing dose gradually. Rituximab was administrated in 3 patients whose annual recurrent time was≥2. Nine patients were divided into 3 groups according to OMS Symptom Severity Standard Rating Scale, 1 of mild degree, 3 of moderate degree, 5 of severe degree. There was no recurrence and sequelae in the mild-degree patient after 3 years follow-up. There was no recurrence and sequelae in 2 of the moderate-degree patients after 1-2 years follow-up. Different degrees of motor, cognitive sequelae were found in 1 of moderate-degree patients and all of severe-degree patients after 1-8 years follow-up.Conclusions:Childhood OMS patients have early onset age. Bad symptom severity before treatment and multiphase course are associated with poor prognosis. OMS Symptom Severity Standard Rating Scale is suitable for estimations of long-term prognosis.

Ataxias cerebelosas e infecciones virales: caracterización clínica y mecanismos neuropatogénicos / Cerebellar ataxias and viral infections: clinical characterization and neuropathogenic mechanisms

Introducción: La ataxia constituye una alteración en la coordinación de los movimientos, resultado de una disfunción del cerebelo, sus conexiones, así como alteraciones en la médula espinal, nervios periféricos o una combinación de estas condiciones. Las ataxias se clasifican en hereditarias, esporádicas y en adquiridas o secundarias, en las cuales los virus neurotrópicos constituyen los principales causantes. Objetivo: Actualizar los conocimientos relacionados con las ataxias causadas por virus neurotrópicos y los mecanismos neurodegenerativos que pudieran tener relación con la ataxia. Métodos: Se realizó una revisión bibliográfica incluyendo artículos publicados en las principales bases de datos bibliográficas (Web of Sciences, Scopus, SciELO). Se utilizaron las palabras claves: ataxia, virus neurotrópicos, ataxias cerebelosas, ataxias infecciosas, en inglés y español. Análisis e integración de la información: Los virus más conocidos que provocan ataxias infecciosas son el virus de inmunodeficiencia humana, virus del herpes simple, virus del herpes humano tipo 6, virus de la varicela zoster, virus Epstein-Barr, virus del Nilo Occidental, y enterovirus 71, aunque existen otros virus que causan esta afectación. Los mecanismos neuropatogénicos sugeridos son la invasión directa del virus y procesos inmunopatogénicos desencadenados por la infección. Estos virus pueden causar ataxia cerebelosa aguda, ataxia aguda posinfecciosa, síndrome opsoclono-mioclono-atáxico y ataxia por encefalomielitis aguda diseminada. Aunque la mayoría de los reportes de casos informan la evolución satisfactoria de los pacientes, algunos refieren complicaciones neurológicas e incluso la muerte. Conclusiones: Actualmente existe la necesidad de profundizar en el estudio de este tipo de ataxia para favorecer su diagnóstico y tratamiento(AU)

Introduction: Ataxia is an alteration in the coordination of movements caused by a dysfunction of the cerebellum and its connections, as well as alterations in the spinal cord, the peripheral nerves, or a combination of these factors. Ataxias are classified into hereditary, sporadic and acquired or secondary, in which neurotropic viruses are the main causative agents. Objective: Update knowledge about ataxias caused by neurotropic viruses and the neurodegenerative mechanisms which could bear a relationship to ataxia. Methods: A review was conducted of papers published in the main bibliographic databases (Web of Sciences, Scopus, SciELO), using the search terms ataxia, neurotropic virus, cerebellar ataxias, infectious ataxias, in English and in Spanish. Discussion: The best known viruses causing infectious ataxias are the human immunodeficiency virus, herpes simplex virus, human herpesvirus 6, varicella zoster virus, Epstein-Barr virus, Western Nile virus and enterovirus 71, though other viruses may also cause this condition. The neuropathogenic mechanisms suggested are direct invasion of the virus and immunopathogenic processes triggered by the infection. These viruses may cause acute cerebellar ataxia, acute postinfectious ataxia, opsoclonus-myoclonus-ataxia syndrome and ataxia due to acute encephalomyelitis disseminata. Though most case reports describe a satisfactory evolution of patients, some refer to neurological complications and even death. Conclusions: There is a current need to carry out further research about this type of ataxia to improve its diagnosis and treatment(AU)

Síndrome de opsoclonus mioclonus secundario a neuroblastoma abdominal. Presentación de un caso clínico pediátrico / Opsoclonus myoclonus syndrome secondary to abdominal neuroblastoma. Presentation of a pediatric clinical case

El síndrome de opsoclonus mioclonus es un trastorno poco frecuente en pediatría. El diagnóstico es clínico y se caracteriza por la presencia de, al menos, tres de los siguientes: opsoclonus, mioclonías, ataxia, irritabilidad y trastornos del sueño. En más del 50 % de los casos, se asocia con la presencia de neuroblastoma. Es un trastorno de origen inmunitario y su tratamiento es a base de inmunosupresores, inmunomoduladores y resección tumoral en los casos secundarios a neuroblastoma. Entre el 70 % y el 80 % de los casos pueden tener secuelas neurológicas, dependiendo de la causa, la gravedad inicial de los síntomas y la velocidad de instauración del tratamiento.Se presenta el caso de un varón de 2 años con diagnóstico de síndrome de opsoclonus mioclonus secundario a un neuroblastoma suprarrenal izquierdo, en el que se realizó la resección tumoral y el tratamiento con corticoides, inmunoglobulina y rituximab.

Opsoclonus-myoclonus syndrome is a rare disorder among pediatric patients.The diagnosis is clinical and is characterized by the presence of at least three of the following: opsoclonus, myoclonus, ataxia, irritability and sleep disorders. In over 50 % of cases it is associated with the presence of Neuroblastoma. It is a disorder of immune origin and its treatment is based on immunosuppressants, immunomodulators and tumor resection in cases secondary to Neuroblastoma. Up to 70 % to 80 % of cases may present neurological sequelae, depending on the cause, the initial severity of symptoms and the delay of proper treatment. We present the case of a 2-year-old male with diagnosis of opsoclonus-myoclonus syndrome secondary to a left adrenal Neuroblastoma. Tumor resection and treatment with corticosteroids, immunoglobulin and rituximab were performed.

Síndrome opsoclonus-mioclonus-ataxia asociado con un teratoma ovárico maduro en un paciente pediátrico / Opsoclonus-mioclonus-ataxia syndrome associated with a mature ovarian teratoma in a pediatric patient

Resumen El síndrome de opsoclonus-mioclonus-ataxia es una entidad rara que cursa con síntomas motores, neurocognitivos y psiquiátricos, con frecuencia marcadamente debilitantes. El síndrome se reporta con mayor frecuencia en adultos que en niños, la etiología es variada, pero en pediatría se presenta en la mayoría de los casos como un síndrome paraneoplásico. En este contexto la neoplasia más frecuentemente asociada es el neuroblastoma. La evidencia actual apoya la tesis de que este es un síndrome mediado inmunológicamente al haberse identificado una serie de auto-anticuerpos en los pacientes afectados, y a que muchos de ellos responden a terapia inmunosupresora. La importancia del reconocimiento de este síndrome radica en que existe tratamiento médico y quirúrgico que podría mejorar el pronóstico neurológico y psiquiátrico. Presentamos el caso de una paciente que se presentó con este síndrome en nuestra institución.

Abstract The opsoclonus-myoclonus-ataxia syndrome is a rare entity that presents with motor, neurocognitive and psychiatric symptoms, often markedly de bilitating. The syndrome is reported more frequently in adults than in chil dren, the etiology is varied, but in pediatrics it occurs in most cases as a paraneoplastic syndrome. In this context, the most frequently associated neoplasm is neuroblastoma followed by gynecological tumors. The current evidence supports the thesis that this is an immune-mediated syndrome because a series of circulating autoantibodies has been described in the affected patients, in addition to many of them responding to immuno suppressive therapy. The importance of recognizing this syndrome is that there is medical/surgical treatment available that could improve the neu rological and psychiatric prognosis. Next, we present the case of a patient who presented with this syndrome in our institution.

Opsoclonus mioclonus en lactante debido a ganglioneuroblastoma: reporte de caso y revisión de literatura / Opsoclonus myoclonus due to ganglioneuroblastoma: case report and literature review

El síndrome de Opsoclonus mioclonus ataxia (SOMA) es una entidad infrecuente en niños, caracterizada por Opsoclonus, mioclonías / ataxia y alteraciones de conducta o de sueño. En la actualidad representa una gran morbilidad dada su naturaleza paraneoplásica y autoinmune; destaca su asociación frecuente con tumores neuroblásticos y su tendencia hacia la cronicidad, recaídas y secuelas en el neurodesarrollo. Se revisa el caso de lactante de 13 meses, uno de los casos reportados a más temprana edad en Colombia, cuyo motivo de consulta fue irritabilidad, temblor distal, opsoclonía, con pruebas negativas para neuroinfección. Posteriormente a estudios se describieron dos masas en ápice torácico izquierdo, una de ellas entre carótida interna y yugular externa. La masa más grande fue de manejo quirúrgico; la patología reportó ganglioneuroblastoma de patrón nodular. No se logró resección quirúrgica completa y tuvo recaída de síntomas; como complicación posquirúrgica se presentó síndrome de Horner incompleto. Al tener difícil acceso quirúrgico se optó por manejo con poliquimioterapia protocolo de riesgo intermedio del COG (Children Oncology Group), que recibió por un año con resolución completa del cuadro clínico. Se presenta el caso de lactante con SOMA de difícil manejo, en el cual el abordaje quirúrgico falló y se requirió terapia complementaria. La quimioterapia se convierte en una opción de manejo cuando la resección quirúrgica no sea completa.

SUMMARY The opsoclonus myoclonus ataxia syndrome (OMA) is an infrequent entity in children, characterized opsoclonus, myoclonus/ataxia, sleep pattern or behavioral alterations. It represents great morbidity given its paraneoplastic and autoimmune nature; it is frequently associated with neuroblastic tumors and its tendency towards chronicity, relapses and neurodevelopmental sequels. We examine the case of a previously healthy thirteen months toddler, one of the earliest age reported cases in Colombia, who consulted for irritability, distal tremor, opsoclonus, and had negative neuroinfection tests. It was reported, after additional studies, the presence of 2 masses in the left pulmonary apex; one of them between the internal carotid artery and the external jugular vein. The bigger mass was surgically removed; pathology reported a ganglioneuroblastoma with nodular pattern. It was not possible to make full surgical resection and the patient experienced a relapse; as a postsurgical complication the patient had transient incomplete Horner syndrome. Due to difficult surgical access, chemotherapy was used for a whole year following the intermediate risk protocol developed by the COG (Children Oncology Group) with full resolution of the symptoms. We present the case of a toddler with difficult surgical approach where the surgical treatment failed, and complementary chemotherapy was needed. Chemotherapy turns into a therapeuthic option when surgical resection is not complete.

Two Cases of Seronegative Paraneoplastic Neurologic Syndrome with Opsoclonus Nystagmus / 대한이비인후과학회지

The dizziness associated with paraneoplastic neurologic syndrome is hard to diagnose clinically because the prevalence of disease is rare, and radiologic and serologic examination result may come out normal. Opsoclonus-myoclonus symdrome is a representative of classical paraneoplastic neurologic syndromes. In this paper, we report 2 cases of paraneoplastic neurologic syndromes with negative serologic auto-antibody test and no brain lesion on MRI. Both cases were eventually diagnosed through PET. Patients with opsoclonus-myoclonus type nystagmus should be evaluated for paraneoplastic neurologic syndrome even if their radiologic and serologic findings are normal.

Síndrome De Kinsbourne: Papel De Rituximab / Kinsbourne Syndrome: Role Of Rituximab

Resumen El Síndrome de Kinsbourne también conocido como "síndrome de opsoclonus-mioclonus" (SOM) o "síndrome de los ojos danzantes" se considera una enfermedad rara y poco frecuente. Se caracteriza por una triada clásica: movimientos oculares rápidos, irregulares, multidireccionales (opsoclonus), movimientos mioclónicos en tronco, cara y/o extremidades y ataxia. La etiología es diversa pudiendo presentarse tanto de origen paraneoplásico como no paraneoplásico e idiopática. Fundamentalmente el tratamiento se realiza con inmunosupresores (corticoides), posteriormente inmunoglobulinas inespecifícas endovenosas y rituximab endovenoso. Procedemos a presentar un caso clínico de un niño de 4 años el cuál presentó dicho síndrome debido a una infección por Klebsiella pneumoniae.

Abstract: Kinsbourne syndrome, also known as "Opsoclonus-myoclonus syndrome" or "Dancing eyes syndrome" is a rare condition characterized by rapid, irregular, multi-directional eye movements (opsoclonus), myoclonic movements in the trunk, face and/or limbs and ataxia. It occurs in children aged between 6 and 36 months. Its etiology may be paraneoplasic (neuroblastoma), non-paraneoplasic (infectious processes) or idiopathic. Regardless of its etiology, immunosuppressive drugs have been used in order to reduce the formation of antibodies possibly involved in the pathophysiology. We report the case of a four years-old boy with this syndrome secondary to an infectious urinary illness. He had ataxia, opsoclonus, upper limbs myoclonus, irritability and altered sleep pattern. Neuroblastoma was ruled out. Initial management was done with methylprednisolone pulses, followed by oral prednisolone and intravenous gammaglobulin. He started with rituximab with a good response. He had progressive clinical improvement, and is currently asymptomatic with no sequelae. In these patients a paraneoplasic syndrome should always be ruled out.

Caracterização clínica das síndromes neurológicas durante a tríplice epidemia de arboviroses em Salvador, Bahia, Brasil / Clinical characterization of neurological syndromes during the triple arbovirus epidemic in Salvador, Bahia, Brazil

INTRODUÇÃO: Os arbovírus são vírus transmitidos por vetores artrópodes e diversos deles podem ser encontrados em cocirculação no Brasil. Complicações neurológicas associadas aos vírus dengue (DENV), chikungunya (CHIKV) e zika (ZIKV) já foram descritas anteriormente na literatura. Durante a tríplice epidemia de arboviroses houve um aumento importante de casos neurológicos, principalmente síndrome de Guillain-Barré (GBS).MATERIAL E MÉTODOS: Iniciada uma vigilância hospitalar para síndromes neurológicas agudas, onde foram incluídos pacientes avaliados em unidades neurológicas de dois hospitais de referência em Salvador/BA durante o período de maio de 2015 a abril de 2016.RESULTADOS: Cinco artigos foram escritos para melhor caracterização do tema. Dois casos de GBS clássico associado ao ZIKV foram publicados durante o surto supracitado, sendo um dos primeiros artigos no Brasil relacionando as duas doenças. Foi realizada a descrição com detalhes o caso da rara síndrome opsoclonus-mioclonusencefalite (OMAS), no qual a pacientes e apresentara com alteração de sensório, movimentos oculares anárquicos e ataxia. Na investigação foram detectados o DENV e CHIKV no plasma e o CHIKV no líquor pelo RTPCR.A paciente foi tratada com corticoide venoso e teve alta com melhora funcional, semalterações cognitivas ou motoras. Uma série de 5 casos descreveu com mais detalhe uma forma neurológica mais leve, a polineuropatia sensitiva reversível (RSP). Todos os pacientes apresentaram quadros transitórios, exclusivamente de alterações sensitivas; dois casos tinham evidência de infecção recente por ZIKV e outros 2 por CHIKV. Uma série de casos de pacientes com GBS, avaliou 14 indivíduos, sendo que 50% destes apresentavam variantes dessa doença. Havia uma maior prevalência de acometimento do nervo facial do que nas populações previamente estudadas. Prevaleceu a forma desmielinizante na eletroneuromiografia desses pacientes. Setenta e dois por cento dos pacientes foram reavaliados em 30 dias e todos tiveram ótima recuperação funcional. Por fim foi escrito um estudo de corte transversal que descreveu as síndromes neurológicas ocorridas em Salvador durante o surto da tríplice arboviral com 29 pacientes acompanhados; aproximadamente 50% se apresentaram com GBS ou suas variantes. Outras manifestações como encefalites, mielites, OMAS e RSP foram descritas. Cerca de 80% dos pacientes apresentavam evidência sorológica de infecção recente por ZIKV ou CHIKV. CONCLUSÃO: Foram descritas manifestações neurológicas como GBS e outras síndromes relacionadas às arboviroses. O melhor conhecimento dessas manifestações pode trazer benefício para prevenção, diagnóstico e tratamento dessas doenças, assim como melhorar as ações em saúde pública para combate às complicações por arboviroses

INTODUCTION: Arboviruses are viruses transmitted by arthropod vectors and several ofthem can be found in cocirculation in Brazil. Neurological complications associated with dengue virus (DENV), chikungunya (CHIKV) and zika (ZIKV) have previously been described in the literature. During the triple epidemic of arboviruses there was a significant increase in neurological cases, mainly Guillain-Barré syndrome (GBS). MATERIAL AND METHODS: A hospital surveillance for acute neurological syndromes was started, which included patients evaluated in neurological units of two reference hospitals in Salvador / BA during the period from May 2015 to April 2016. RESULTS: Five articles were written to better characterize the clinical manifestations. Two cases of classic GBS associated with ZIKV were published during triple arbovirosis outbreak, being one of the first articles in Brazil correlating the two diseases. A detailed description was made of the rare opsoclonus-myoclonus encephalitis syndrome (OMAS), in another article, in which the patient presented with confusion, anarchical ocular movements and ataxia. DENV and CHIKV were detected in plasma and CHIKV in the CSF by RT-PCR. The patient was treated with venous corticosteroids and was discharged with functional improvement, without cognitive or motor alterations. A series of 5 cases described a milder neurological form, the reversible sensory polyneuropathy (RSP). All patients presented only with transient sensory disturbances; two cases evidenced recent infection by ZIKV and another 2 by CHIKV. A case-series of GBS patients evaluated 14 individuals, with 50% of them presenting with GBS subtypes. There was a higher prevalence of facial nerve involvement than in the previously studied populations. The demyelinating form prevailed in the electroneuromyography studies of these patients. Seventy-two percent of the patients were reassessed in 30 days and all had an optimal functional recovery. Finally, a cross-sectional study was written and described the neurological syndromes that occurred in Salvador during the outbreak of the triple arboviral with 29 patients followed up; approximately 50% presented with GBS or its subtypes. Other manifestations such as encephalitis, myelitis, OMAS and RSP were described. About 80% of the patients had serological evidence of recent infection by ZIKV or CHIKV. CONCLUSION: Neurological manifestations such as GBS and other syndromes related to arbovirus have been described. The better knowledge of these manifestations can benefit the prevention, diagnosis and treatment of these diseases, as well as to improve the actions in public health to combat complications by arbovirosis

Clinical analysis of three cases of ocular flutter-opsoclonus in adults / 中华神经科杂志

Objective Through an analysis of three cases of ocular flutter-opsoclonus in adults and a review of the relevant literature,we summarized its characteritics to improve the clinical awareness of this sign.Methods Three cases of adult-onset ocular flutter-opsoclonus from July 2014 to July 2017 were retrospectively analyzed in terms of clinical features,cerebrospinal fluid (CSF) analysis,brain imaging,etiologies and treatment,and followed up through telephone calls.Results Case 1:A 68-year-old man presented with ocular flutter,vertigo,myoclonus,ataxia and conscious disturbance.CSF analysis demonstrated pleocytosis and mildly elevated protein level.Brain MR imaging revealed ischemia,and SPECT showed hypoperfusion involving left frontal and occipital lobes.Paraneoplastic syndrome was considered as the etiology.The symptoms subsided without any specific treatment.He died from lung cancer within one year.Case 2:A 66-year-old man presented with ocular flutter,vertigo,ataxia,conscious disturbance and fever.CSF protein level was severely elevated.Brain MR imaging revealed ischemia.Epstein-Barr virus infection was considered as the etiology.The symptoms improved with the administration of antiviral drugs and steroid.Relapse was not observed in the two-year follow-up.Case 3:A 34-year-old woman presented with opsoclonus,oscillopsia,vertigo,ataxia,conscious disturbance and fever.MR imaging showed midbrain lesions.Viral brainstem encephalitis was considered as the etiology.The symptoms improved with the administration of antiviral drugs,steroid,intravenous immunoglobulin and clonazepam.Relapse was not observed in the two-year follow-up.Conclusions Infection and tumors are common etiologies of ocular flutter-opsoclonus.Treatment includes etiological management for infection or tumors and immunosuppressive therapy.The clinical outcomes vary with the underlying etiologies.

Síndrome de Kinsbourne: reporte de un caso / Síndrome de Kinsbourne: reporte de um caso / Kinsbourne syndrome: Report of a case

El síndrome de Kinsbourne, conocido también como “síndrome de opsoclonus-mioclonus” o “síndrome de los ojos danzantes”, es una enfermedad rara caracterizada por movimientos oculares rápidos, irregulares, multidireccionales (opsoclonus), movimientos mioclónicos en tronco, cara y/o extremidades y ataxia; se presenta entre los 6 y 36 meses de edad. Su etiología puede ser paraneoplásica (neuroblastoma), no paraneoplásica (infecciosa) o idiopática. Independientemente de la causa, se han utilizado inmunosupresores para reducir la formación de anticuerpos posiblemente involucrados en su fisiopatología. Presentamos el caso de una niña lactante de 21 meses con este síndrome secundario a un cuadro respiratorio viral. Tuvo ataxia, opsoclonus, mioclonías de miembros superiores, irritabilidad y alteración en el patrón de sueño. Se descartó el diagnóstico de neuroblastoma. El tratamiento inicial se hizo con pulsos de metilprednisolona seguida de prednisolona oral. Sus síntomas desaparecieron progresivamente y recuperó la marcha; actualmente está asintomática y sin secuelas. En estos pacientes se debe descartar siempre un síndrome paraneoplásico.

Kinsbourne syndrome, also known as “Opsoclonus-myoclonus syndrome” or “Dancing eyes syndrome” is a rare condition characterized by rapid, irregular, multi-directional eye movements (opsoclonus), myoclonic movements in the trunk, face and/or limbs and ataxia. It occurs in children aged between 6 and 36 months. Its etiology may be paraneoplasic (neuroblastoma), non-paraneoplasic (infectious processes) or idiopathic. Regardless of its etiology, immunosuppressive drugs have been used in order to reduce the formation of antibodies possibly involved in the pathophysiology. We report the case of a 21 month-old girl with this syndrome secondary to an infectious respiratory illness. She had ataxia, opsoclonus, upper limbs myoclonus, irritability and altered sleep pattern. Neuroblastoma was ruled out. Initial management was done with methylprednisolone pulses, followed by oral prednisolone. She had progressive clinical improvement, and is currently asymptomatic with no sequelae. In these patients a paraneoplasic syndrome should always be ruled out.

A síndrome de Kinsbourne, conhecida também como “síndrome de opsoclonus-mioclonus” a “síndrome dos olhos dançantes”, é uma doença rara caracterizada por movimentos oculares rápidos, irregulares, multidirecionais (opsoclonus), movimentos mioclônicos em tronco, cara e/ou extremidades e ataxia; se apresenta entre os 6 e 36 meses de idade. Sua etiologia pode ser paraneoplásica (neuroblastoma), não paraneoplásica (infecciosa) ou idiopática. Independentemente da causa, se há utilizado imunossupressores para reduzir a formação de anticorpos possivelmente envolvidos em sua fisiopatologia. Apresentamos o caso de uma criança lactante de 21 meses com esta síndrome secundária a um quadro respiratório viral. Teve ataxia, opsoclonus, mioclonias de membros superiores, irritabilidade e alteração no padrão de sono. Se descartou o diagnóstico de neuroblastoma. O tratamento inicial se fez com pulsos de metilprednisolona seguida de prednisolona oral. Seus sintomas desapareceram progressivamente e recuperou a marcha; atualmente está assintomática e sem sequelas. Nestes pacientes se deve descartar sempre uma síndrome paraneoplásico.

Opsoclonus-Myoclonus Syndrome Associated with Scrub Typhus / 대한평형의학회지

Scrub typhus is an infective acute febrile disorder caused by the intracellular parasite Orientia tsutsugamushi. Neurological manifestations of scrub typhus are meningoencephalitis, cerebellitis, transverse myelitis, papilledema, and cranial nerve palsy. However, opsoclonus-myoclonus syndrome associated with scrub typhus has been rarely reported. A 59-year-old man developed vertigo, nausea, vomiting, and imbalance following scrub typhus infection for eight days. Examination showed eschar at the axilla, decreased mentality, and opsoclonus-myoclonus syndrome. Video-oculography disclosed opsoclonus with an amplitude of 15°–20° and a frequency of 6–8 Hz. The serum antibody titers to Orientia tsutsugamushi were 1:5,120, and cerebrospinal fluid analysis revealed pleocytosis. Brain magnetic resonance imaging was normal. Neurological symptoms and signs completely improved by systemic steroid and antibiotics treatment. Various mechanisms including direct disseminating inflammation or indirect immune modulation may give rise to neurological complications following scrub typhus.

Síndrome opsoclonus mioclonus paraneoplásico en pediatría: reporte de caso y revisión de la literatura / Paraneoplastic opsoclonus myoclonus syndrome in children: case report and literature review

El síndrome opsoclonus mioclonus (SOM) es una entidad poco frecuente en pediatría que por consenso de expertos se define como aquel que cumple tres de cuatro criterios: opsoclonus, ataxia, mioclonus, alteraciones de la conducta o del sueño y diagnóstico de neuroblastoma. Frecuentemente el SOM en niños se presenta asociado a tumores de la cresta neural, siendo el neuroblastoma el más prevalente, seguido por ganglioneuroblastoma, ganglioneuroma y hepatoblastoma. La asociación SOM y neuroblastoma tiene su pico de incidencia entre los 6 y 36 meses de edad y la posibilidad de que un niño con SOM tenga un neuroblastoma es de cerca del 50%. Si bien el SOM no es una patología frecuente en pediatría, su asociación con enfermedades neoplásicas sí lo es y desconocer su existencia y la presentación clínica puede llevar a demoras o subdiagnóstico del tumor con impacto negativo en el pronóstico tanto de la entidad de base como del futuro neurológico del paciente. Se presenta el caso de una niña de 15 meses con SOM asociado a ganglioneuroblastoma retroperitoneal que mejoró luego de la resección del tumor y el tratamiento con corticoides e inmunoglobulina.

Opsoclonus Myoclonus Syndrome (OMS) is a rare condition in children, that for expert consensus is defined to be met three of the four criteria: opsoclonus, ataxia, myoclonus, behavioral disorders or sleep and diagnosis of neuroblastoma. OMS frequently occurs in children associated with neural crest tumors, the most prevalent being neuroblastoma, followed by ganglioneuroblastoma, ganglioneuroma, and hepatoblastoma. The OMS association and neuroblastoma has a peak incidence between 6 and 36 months of age and the possibility that a child with neuroblastoma have a OMS is about 50%. While the OMS is not a common pediatric pathology, its association with neoplastic disease is very strong and ignore its existence and clinical presentation may lead to delays or underdiagnosis of the tumor with negative impact on the prognosis of the entity base and the future neurological patient. Here we present the case of a girl of 15 months with OMS associated with retroperitoneal ganglioneuroblastoma that improved after tumor resection and treatment with corticosteroids and immunoglobulin.

Cortical Hypometabolism in Opsoclonus-Myoclonus Syndrome

Opsoclonus-myoclonus syndrome (OMS) is characterized by opsoclonus and arrhythmic myoclonic jerks predominantly involving the trunk, limbs, and head. We present two patients with OMS after respiratory tract infection who exhibited diffuse cerebral hypometabolism, particularly in the parieto-occipital cortex on 18F-fluorodeoxyglucose positron-emission tomography (F-FDG PET). This metabolic change might be a consequence rather than a direct cause of motor symptoms, which may be attributable to brainstem or cerebellar pathology.

Ataxia aguda en la población pediátrica de la Fundación Hospital de laMisericordia 2009-2013 / Acute Ataxia in the Pediatric Population of the Fundacion Hospital de la Misericordia 2009-2013

La ataxia aguda (AA) en la población pediátrica generalmente es secundaria a disfunción cerebelosade origen inmunológico. En urgencias, la rápida detección de patologías de menor frecuencia y mayorgravedad que requieren tratamiento específico es prioridad.Objetivos: Describir la etiología de la AA en los pacientes valorados por Neuropediatría en la FundaciónHospital la Misericordia entre los años 2009 y 2013.Métodos y Materiales: Estudio descriptivo tipo serie de casos. Revisión retrospectiva de historias clínicas depacientes de 1 mes a 18 años con diagnóstico definitivo de AA. Análisis de datos mediante SPSS 21, medidasde tendencia central, Kaplan Meier y prueba de Log Rank.Resultados: Se recopilaron 48 casos, de los cuales el 91,67% fue de origen cerebeloso. El diagnóstico etiológicomás frecuente fue cerebelitis o romboencefalitis viral en 25%, seguido de intoxicación aguda y post infecciosa(20,5% cada una). En cuanto a pronóstico, el 60.4 % tuvo una recuperación completa, siendo esta más rápidaen la ataxia postinfecciosa, tóxica y post traumática.Discusión: La disfunción cerebelosa fue la causa más frecuente de ataxia, los diagnósticos etiológicos principalesfueron ataxia de origen infeccioso y post infeccioso, el antecedente de infección 1 a 30 días antes del iniciode los síntomas neurológicos fue positivo en 41.67 %, lo que sugiere un importante papel de la inmunidad.Conclusiones: La mayoría de las ataxias agudas son secundarias a disfunción cerebelosa infecciosa, inmunológicao tóxica; el pronóstico depende de la etiología y generalmente es benigno...

Opsoclonus-Myoclonus Syndrome Associated with Mumps Virus Infection

BACKGROUND: Opsoclonus-myoclonus syndrome (OMS) is a rare neurological disorder that is characterized by involuntary eye movements and myoclonus. OMS exhibits various etiologies, including paraneoplastic, parainfectious, toxic-metabolic, and idiopathic causes. The exact immunopathogenesis and pathophysiology of OMS are uncertain. CASE REPORT: We report the case of a 19-year-old male who developed opsoclonus and myoclonus several days after a flu-like illness. Serological tests revealed acute mumps infection. The findings of cerebrospinal fluid examinations and brain magnetic resonance imaging were normal. During the early phase of the illness, he suffered from opsoclonus and myoclonus that was so severe as to cause acute renal failure due to rhabdomyolysis. After therapies including intravenous immunoglobulin, the patient gradually improved and had fully recovered 2 months later. CONCLUSIONS: This is the first report of OMS associated with mumps infection in Korea. Mumps infection should be considered in patients with OMS.

Síndrome de Kinsbourne: relato de caso / Kinsbourne syndrome: case report / Síndrome de Kinsbourne: relato de caso

JUSTIFICATIVA E OBJETIVOS: A síndrome de Kinsbourne é uma doença neurológica rara que afeta, principalmente, crianças previamente hígidas, na faixa etária entre seis e trinta e seis meses, caracterizada pela presença de opsoclonia (movimentos oculares rápidos, irregulares, horizontais e verticais), mioclonias que podem afetar tronco, extremidades ou face e ataxia cerebelar. Pode ser considerada uma síndrome paraneoplásica pela associação com neuroblastomas, ganglioneuroma e raramente hepatoblastomas. Foi objetivo deste artigo apresentar os aspectos mais relevantes da síndrome de Kinsbourne, bem como a técnica anestésica usada para ressecção de tumor de mediastino em uma criança portadora desta síndrome. RELATO DO CASO: Criança de um ano e cinco meses com diagnóstico de tumor do mediastino posterior portadora de síndrome de Kinsbourne. Pré-medicação com midazolam oral. Indução da anestesia com sevoflurano, óxido nitroso, fentanil e rocurônio. Manutenção da anestesia com sevoflurano, óxido nitroso, fentanil e rocurônio. Reversão do bloqueio neuromuscular com neostigmina associado à atropina. Analgesia pós-operatória com o uso de dipirona, cetoprofeno e morfina. Levada para a Unidade de Terapia Intensiva extubada, com parâmetros hemodinâmicos e respiratórios estáveis. Alta da UTI quatro dias após a cirurgia e alta hospitalar no sétimo dia de pós-operatório sem intercorrências. Anátomo-patológico evidenciou para ganglioneuroblastoma. CONCLUSÕES: A síndrome de Kinsbourne é uma doença neurológica rara. As drogas usadas em nosso paciente mostraram ser seguras e permitiram uma anestesia sem intercorrências. Drogas que desencadeiam ou agravam opsoclonia e mioclonias, como cetamina e etomidato, deverão ser evitadas nesses pacientes.

BACKGROUND AND OBJECTIVES: Kinsbourne syndrome is a rare neurological disorder that primarily affects children previously healthy and aged between 6 and 36 months. It is characterized by opsoclonus (rapid, irregular, horizontal and vertical eye movements) and myoclonus that may affect trunk, limbs or face, and cerebellar ataxia. It may be considered a paraneoplastic syndrome by association with neuroblastomas, hepatoblastomas and, rarely, ganglioneuromas. The aim of this paper was to present the most relevant aspects of Kinsbourne syndrome, as well as the technique used for resection of mediastinal tumor in a child with this syndrome. CASE REPORT: Child, 1 year and 5 months, with a diagnosis of posterior mediastinal tumor and Kinsbourne syndrome. Premedicated with oral midazolam. Anesthesia induced with sevoflurane, nitrous oxide, fentanyl, and rocuronium. Maintenance of anesthesia with sevoflurane, nitrous oxide, fentanyl, and rocuronium. Neuromuscular block reversal with neostigmine combined with atropine. Postoperative analgesia with the use of dipyrone, morphine, and ketoprofen. Taken to the intensive care unit extubated, with stable hemodynamic and respiratory parameters. ICU discharge four days after surgery and hospital discharged on the seventh postoperative day without complications. Anatomopathological examination revealed ganglioneuroblastoma. CONCLUSIONS: Kinsbourne syndrome is a rare neurological disorder. The drugs used in our patient proved safe and allowed an uneventful anesthesia. Drugs that trigger or aggravate opsoclonus and myoclonus, such as ketamine and etomidate, should be avoided in these patients.

JUSTIFICATIVA Y OBJETIVOS: El síndrome de Kinsbourne es una enfermedad neurológica rara que afecta principalmente a los niños anteriormente sanos, en una franja etaria entre los 6 y los 36 meses, y que se caracteriza por la presencia de opsoclonia (movimientos oculares rápidos, irregulares, horizontales y verticales), mioclonias que pueden afectar el tronco, las extremidades o la cara, y por la ataxia cerebelar. Puede ser considerado un síndrome paraneoplásico por la asociación con los neuroblastomas, ganglioneroma y raramente hepatoblastomas. El objetivo de este artículo, fue presentar los aspectos más relevantes del síndrome de Kinsbourne, como también la técnica anestésica usada para la resección del tumor del mediastino en un niño portador de ese síndrome. RELATO DEL CASO: Niño de 1 año y 5 meses con diagnóstico de tumor del mediastino posterior, portador del síndrome de Kinsbourne. Premedicación con midazolam oral. Inducción de la anestesia con sevoflurano, óxido nitroso, fentanilo y rocuronio. Mantenimiento de la anestesia con sevoflurano, óxido nitroso, fentanilo y rocuronio. Reversión del bloqueo neuromuscular con neostigmina asociado a la atropina. Analgesia postoperatoria con el uso de dipirona, cetoprofeno y morfina. Fue derivado a la Unidad de Cuidados Intensivos y desentubado con parámetros hemodinámicos y respiratorios estables. El alta de la UCI fue cuatro días después de la cirugía y el alta hospitalaria fue al séptimo día del postoperatorio sin intercurrencias. La anatomo-patología arrojó un ganglioneuroblastoma. CONCLUSIONES: El síndrome de Kinsbourne es una enfermedad neurológica rara. Los fármacos usados en nuestro paciente, mostraron ser seguros permitiendo una anestesia sin intercurrencias. Los fármacos que desencadenan o que agravan la opsoclonia y mioclonias, como la cetamina y el etomidato, deberán ser evitados en esos pacientes.

Síndrome de opsoclonus-mioclonus secundario a neuroblastoma torácico. Presentación de un caso clínico y discusión de nuevas estrategias terapéuticas / Syndrome thoracic neuroblastoma secondary to opsoclonus-myoclonus. Presentation of a case and discussion of new therapeutic strategies

El síndrome de opsoclonus-mioclonus o síndrome de Kinsbourne es un trastorno poco frecuente. El diagnóstico es clínico y se caracteriza por la presencia de opsoclonus, mioclonías, ataxia, irritabilidad y trastornos del sueño. En 45% de los casos se asocia con la presencia de neuroblastoma. Es un trastorno de origen inmunitario y sutratamiento es en base a inmunosupresores, inmunomoduladores y resección tumoral en los casos secundarios a neuroblastoma. Durante años los corticoides han sido el tratamiento gold standard, asociándose posteriormente la inmunoglobulina endovenosa. Sinembargo, dada la alta prevalencia de corticodependencia y de sus efectos adversos, así como el mal pronóstico neurológico (entre 70% y 80% de los casos pueden tener secuelas neurológicas: déficit cognitivo, alteraciones visuales, motoras, práxicas, del lenguaje y conductuales), las investigaciones en los últimos años se han centrado en la utilización de nuevos fármacos. Los últimos estudios publicados avalan el uso de la terapia multimodal con el agregado de un tercer fármaco como el rituximab o laciclofosfamida. Se presenta el caso clínico de un varón de 2 años y 4 meses con diagnóstico de síndrome deopsoclonus-mioclonus se cundario a un neuroblastomatorácico en el que se realizó la resección tumoral y tratamiento con corticoides, inmunoglobulina y ciclofosfamida. Presentó una recaída frente al descenso de los corticoides y, actualmente, al año y seis meses del diagnóstico bajo dosis bajas de corticoides tiene un retraso en la adquisición del lenguaje sin otros síntomas acompañantes...