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Peripheral neuropathies in childhood: a neuropathological approach

Neuropatias periféricas na infância: uma abordagem neuropatológica

Abstracts

Peripheral neuropathies affect children more often than the young and middle age adults, but less frequently than the elderly. They differ from those in the adults because of the high incidence of hereditary neuropathies, including those associated with metabolic and degenerative disorders of the central nervous system; the low incidence of toxic neuropathies and those associated with systemic disorders; and a lower incidence of chronic acquired polineuropathies. Nerve biopsies are indicated if the diagnosis has not been made with clinical and electrophysiologic studies and other methods, and should only be performed in laboratories with appropriate techniques for the study of the nerve. It is important to know the normal development of the nerve, the thickness of the myelin sheath and the distribution of small and large fibers, according to the age. The main morphological aspects of the most frequent neuropathies in children - acquired (inflammatory, demyelinating) and hereditary (sensory-motor, sensory-autonomic, ataxic, and those associated with metabolic and degenerative disorders), are reviewed.

peripheral neuropathies; childhood; nerve biopsy; morphology


As neuropatias periféricas afetam as crianças mais frequentemente do que os adultos jovens e de meia idade, mas menos frequentemente do que os mais velhos. Diferem das dos adultos pela alta incidência de neuropatias hereditárias, incluindo as associadas a doenças metabólicas e degenerativas do sistema nervoso central; pela baixa incidência de neuropatias tóxicas e associadas a doenças sistêmicas; e pela menor incidência de polineuropatias crônicas adquiridas. As biópsias de nervo são indicadas se o diagnóstico não for feito com estudos clínicos, eletrofisiológicos e outros métodos de investigação, e só devem ser realizadas em laboratórios que dispõem de técnicas apropriadas para estudo do nervo. É importante conhecer o desenvolvimento do nervo periférico, a espessura da mielina e a distribuição das fibras quanto ao calibre, segundo a faixa etária. Nesta revisão são abordados os principais aspectos morfológicos das neuropatias mais frequentes na infância - formas adquiridas (inflamatórias, desmielinizantes) e hereditárias (sensitivo-motoras, sensitivo- autonômicas, atáxicas e associadas a doenças metabólicas e degenerativas).

neuropatias periféricas; infância; biópsia de nervo; morfologia


Neuropatias periféricas na infância: uma abordagem neuropatológica

Peripheral neuropathies in childhood: a neuropathological approach

Leila Chimelli

Departamento de Patologia, Faculdade de Medicina de Ribeirão Preto, Universidade de São Paulo (USP). MD, PhD, Professora Associada

RESUMO

As neuropatias periféricas afetam as crianças mais frequentemente do que os adultos jovens e de meia idade, mas menos frequentemente do que os mais velhos. Diferem das dos adultos pela alta incidência de neuropatias hereditárias, incluindo as associadas a doenças metabólicas e degenerativas do sistema nervoso central; pela baixa incidência de neuropatias tóxicas e associadas a doenças sistêmicas; e pela menor incidência de polineuropatias crônicas adquiridas. As biópsias de nervo são indicadas se o diagnóstico não for feito com estudos clínicos, eletrofisiológicos e outros métodos de investigação, e só devem ser realizadas em laboratórios que dispõem de técnicas apropriadas para estudo do nervo. É importante conhecer o desenvolvimento do nervo periférico, a espessura da mielina e a distribuição das fibras quanto ao calibre, segundo a faixa etária. Nesta revisão são abordados os principais aspectos morfológicos das neuropatias mais frequentes na infância - formas adquiridas (inflamatórias, desmielinizantes) e hereditárias (sensitivo-motoras, sensitivo- autonômicas, atáxicas e associadas a doenças metabólicas e degenerativas).

Palavras-chave: neuropatias periféricas, infância, biópsia de nervo, morfologia.

ABSTRACT

Peripheral neuropathies affect children more often than the young and middle age adults, but less frequently than the elderly. They differ from those in the adults because of the high incidence of hereditary neuropathies, including those associated with metabolic and degenerative disorders of the central nervous system; the low incidence of toxic neuropathies and those associated with systemic disorders; and a lower incidence of chronic acquired polineuropathies. Nerve biopsies are indicated if the diagnosis has not been made with clinical and electrophysiologic studies and other methods, and should only be performed in laboratories with appropriate techniques for the study of the nerve. It is important to know the normal development of the nerve, the thickness of the myelin sheath and the distribution of small and large fibers, according to the age. The main morphological aspects of the most frequent neuropathies in children - acquired (inflammatory, demyelinating) and hereditary (sensory-motor, sensory-autonomic, ataxic, and those associated with metabolic and degenerative disorders), are reviewed.

Key words: peripheral neuropathies, childhood, nerve biopsy, morphology.

Texto completo disponível apenas em PDF.

Full text available only in PDF format.

Aceite: 22-março-1996.

Dra. Leila Chimelli - Departamento de Patologia, Faculdade de Medicina de Ribeirão Preto, USP - Avenida Bandeirantes 3900 - 14049-900 Ribeirão Preto SP - Brasil.

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Publication Dates

  • Publication in this collection
    10 Nov 2010
  • Date of issue
    Sept 1996
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