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Encefalite herpética disseminada: apresentação de um caso autopsiado com estudo imuno-histoquímico

Disseminated herpetic encephalitis: report of an autopsied case with immunohistochemical study

Resumos

Relata-se um caso autopsiado de encefalite herpética disseminada em criança de um ano e três meses. O paciente era sadio até a moléstia atual quando apresentou febre, crises convulsivas repetidas e alterações de consciência que progrediram para o coma, evoluindo ao óbito em oito dias. O quadro neuropatológico era caracterizado por necrose e inflamação em focos múltiplos disseminados nos hemisférios cerebrais, tronco encefálico e cerebelo. A técnica da Avidina-Biotina-Peroxidase revelou, em neurônios do tálamo, imunor-reatividade intra-citoplasmática e muito raramente intranuclear para antígeno do herpes-vírus tipo 1. Este caso difere dos demais de encefalite herpética descritos na literatura em dois aspectos: (1) pela disseminação das lesões, em contraste com as formas limitadas topograficamente ao sistema límbico e, menos comumente, ao tronco encefálico; (2) pela presença de necrose, inflamação e hemorragias focais, alterações estas praticamente ausentes nos casos de encefalite disseminada tipicamente descritos em indivíduos imunodeprimidos.


An autopsied case of disseminated herpetic encephalitis in a previously healthy one-year-and-three-month-olu child is reported. He had fever, repeated convulsive crises and alterations of consciousness which progressed into a coma, leading to death in eight days. The neuropathological picture was characterized by necrosis and inflammation in multiple foci disseminated in the cerebral hemispheres, brainstem and cerebellum. The Avidin-Biotin-Peroxidase Complex technique showed, in neurons of the thalamus, intra-cytoplasmatic immunoreactivity, and, very rarely, intranuclear for the Herpes simplex virus type 1 antigens. This case differs from the other herpetic encephalitis ones described in the literature in two aspects: (1) by the dissemination of the lesions, in contrast with the forms topographically limited to the limbic system and, less commonly, to the brainstem; (2) by the presence of necrosis, inflammation and focal hemorrhage, which are alterations that practically do not exist in cases of disseminated encephalitis tipically described in immuno-depressed individuals.


Encefalite herpética disseminada: apresentação de um caso autopsiado com estudo imuno-histoquímico

Disseminated herpetic encephalitis: report of an autopsied case with immunohistochemical study

José Eymard Homem PittellaI; Carlos Eduardo BacchiII; James RobbIII

ILaboratório de Neuropatologia, Departamento de Anatomia Patológica e Medicina Legal, Faculdade de Medicina da Universidade Federal de Minas Gerais, Belo Horizonte

IIDepartamento de Patologia, Faculdade de Medicina da Universidade Estadual e São Paulo, Botucatu

IIIDepartment of Pathology, Scripps Clínic and Research Foundation, La Jolla, California, USA

RESUMO

Relata-se um caso autopsiado de encefalite herpética disseminada em criança de um ano e três meses. O paciente era sadio até a moléstia atual quando apresentou febre, crises convulsivas repetidas e alterações de consciência que progrediram para o coma, evoluindo ao óbito em oito dias. O quadro neuropatológico era caracterizado por necrose e inflamação em focos múltiplos disseminados nos hemisférios cerebrais, tronco encefálico e cerebelo. A técnica da Avidina-Biotina-Peroxidase revelou, em neurônios do tálamo, imunor-reatividade intra-citoplasmática e muito raramente intranuclear para antígeno do herpes-vírus tipo 1. Este caso difere dos demais de encefalite herpética descritos na literatura em dois aspectos: (1) pela disseminação das lesões, em contraste com as formas limitadas topograficamente ao sistema límbico e, menos comumente, ao tronco encefálico; (2) pela presença de necrose, inflamação e hemorragias focais, alterações estas praticamente ausentes nos casos de encefalite disseminada tipicamente descritos em indivíduos imunodeprimidos.

SUMMARY

An autopsied case of disseminated herpetic encephalitis in a previously healthy one-year-and-three-month-olu child is reported. He had fever, repeated convulsive crises and alterations of consciousness which progressed into a coma, leading to death in eight days. The neuropathological picture was characterized by necrosis and inflammation in multiple foci disseminated in the cerebral hemispheres, brainstem and cerebellum. The Avidin-Biotin-Peroxidase Complex technique showed, in neurons of the thalamus, intra-cytoplasmatic immunoreactivity, and, very rarely, intranuclear for the Herpes simplex virus type 1 antigens. This case differs from the other herpetic encephalitis ones described in the literature in two aspects: (1) by the dissemination of the lesions, in contrast with the forms topographically limited to the limbic system and, less commonly, to the brainstem; (2) by the presence of necrosis, inflammation and focal hemorrhage, which are alterations that practically do not exist in cases of disseminated encephalitis tipically described in immuno-depressed individuals.

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Dr. José Eymard Homem Pittella - Departamento de Anatomia Patológica e Medicina Legal, Faculdade de Medicina da VFMG - Av. Alfredo Balena 190 - 30130 Belo Horizonte MG - Brasil.

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Datas de Publicação

  • Publicação nesta coleção
    01 Jun 2011
  • Data do Fascículo
    Dez 1989
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