Abstract:RESUMO -Relatamos dois casos de mutismo observados após ressecção de tumores do cerebelo em duas crianças do sexo feminino, tratando-se, no primeiro caso de meduloblastoma, e no segundo, de astrocitoma juvenil. Em ambas havia lesão pré-operatória de nervos bulbares. A fisiopatogenia do mutismo envolve fatores anatômicos, vasculares e emocionais. As características essenciais do mutismo cerebelar são discutidas com base em revisão da literatura.PALAVRAS-CHAVE: mutismo, afasia, tumores do cerebelo.
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“…Mutism cases are related in the age range from two to ten years. Moreover, it is known as the most common histological type of tumor of the posterior fossa is medulloblastoma [3,4].…”
Pediatric akinetic mutism syndrome is a clinical disease resulting from cerebellar injury and characterized by the absence of speech or reduced speech, emotional lability, there may also be hypotonia, oropharyngeal dysfunction/dysphagia, bladder and intestinal incontinence, or other behavioral disorders and neurological signals. It is described as the most recurrent complication in children, after posterior fossa tumor surgery, mainly related to cerebellar midline injuries. An increasing number of research and prospective reviews have provided valuable information on cerebellar mutism syndrome in recent years. The purpose of this review was to elucidate the pathophysiological basis and the predictive factors for this syndrome. Most cases of mutism are due to injury cerebellar tracts and cerebellar-cerebral circuits, involving particularly distinct points of the dentate-thalamus-cortical and dentato-rubro-thalamus-cortical. Advanced neuroimaging techniques, such as tractography and perfusion studies, have contributed to demonstrating changes in these pathways in patients with pediatric cerebellar mutism.
“…Mutism cases are related in the age range from two to ten years. Moreover, it is known as the most common histological type of tumor of the posterior fossa is medulloblastoma [3,4].…”
Pediatric akinetic mutism syndrome is a clinical disease resulting from cerebellar injury and characterized by the absence of speech or reduced speech, emotional lability, there may also be hypotonia, oropharyngeal dysfunction/dysphagia, bladder and intestinal incontinence, or other behavioral disorders and neurological signals. It is described as the most recurrent complication in children, after posterior fossa tumor surgery, mainly related to cerebellar midline injuries. An increasing number of research and prospective reviews have provided valuable information on cerebellar mutism syndrome in recent years. The purpose of this review was to elucidate the pathophysiological basis and the predictive factors for this syndrome. Most cases of mutism are due to injury cerebellar tracts and cerebellar-cerebral circuits, involving particularly distinct points of the dentate-thalamus-cortical and dentato-rubro-thalamus-cortical. Advanced neuroimaging techniques, such as tractography and perfusion studies, have contributed to demonstrating changes in these pathways in patients with pediatric cerebellar mutism.
Mutismo cerebelar é uma condição rara associada a cirurgias na fossa craniana posterior. É descrita como complicação com maior frequência em crianças, ocorrência após ressecção de tumores cerebelares, principalmente os situados na linha média. O status mental e a cognição não são significativamente acometidos. Relata-se um caso de mutismo transitório em criança de 4 anos de idade após ressecção cirúrgica de um ependimoma cerebelar. No segundo dia de pós-operatório, observou-se quadro de mutismo com recuperação completa 3 meses depois. O substrato anatômico desta complicação é discutido e uma breve revisão da literatura é realizada. Este caso vem somar-se aos poucos casos relatados na literatura desta rara complicação da cirurgia de fossa posterior em crianças.
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