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Clinicopathologic analysis of progressive non-fluent aphasia and corticobasal degeneration:Case report and review

Estudo clínicopatologico de afasia progressiva não-fluente e degeneração córtico-basal: relato de caso e revisão

Abstract

Objective:

To investigate progressive non-fluent aphasia and histopathologically-proven corticobasal degene­ration.

Methods:

We evaluated symptoms, signs, neuropsychological deficits, and radiology data longitudinally, in a patient with autopsy-proven corticobasal degeneration and correlated these observations directly to the neuroanatomic distribution of the disease.

Results:

At presentation, a specific pattern of cognitive impairment was evident with an extreme extrapyramidal motor abnormality. Follow-up examination revealed persistent impairment of praxis and executive functioning, progressive worsening of language performance, and moderately preserved memory. The motor disorder manifested and worsened as the condition progressed. Many of the residual nerve cells were ballooned and achromatic with eccentric nuclei. Tau-immunoreactive pathology was significantly more prominent in neurons in the frontal and parietal cortices and dentate nuclei than in temporal neocortex, hippocampi and brainstem.

Conclusion:

The clinical diagnosis of progressive non-fluent aphasia secondary to corticobasal degeneration hinged on a specific pattern of impaired cognition as well as an extrapyramidal motor disorder, reflecting the neuroanatomic distribution of the disease in frontal and anterior temporal cortices and the dentate nuclei.

Key words:
progressive non-fluent aphasia; neuropsychology; neuroimaging; neuropathology; and corticobasal degeneration.

Resumo

Objetivo:

Investigar o quadro clínico de afasia progressiva não-fluente e confirmação histopatológica de degeneração córtico-basal.

Métodos:

Foram avaliadas as alterações clínicas, neuropsicológicas e de neuroimagem, durante todo o curso clínico da doença. O diagnóstico de degeneração córtico-basal foi confirmado por estudo histopatológico. Essas observações foram diretamente relacionadas com a distribuição anatômica da doença.

Resultados:

Foi observada uma forma específica de prejuízo cognitivo associada com importante alteração extrapiramidal. Durante o curso clínico, surgiram apraxia e disfunção executiva, piora progressiva da linguagem e memória moderadamente preservada. As alterações extrapiramidais pioraram progressivamente à rigidez universal e postura distônica. As reações de imunohistoquímica para a proteína tau foram significativamente mais proeminentes nos neurônios residuais de aspecto baloniformes e acromáticos do córtex frontal e parietal e núcleo denteado do cerebelo do que nos do neocórtex temporal, hipocampo e tronco cerebral.

Conclusão:

O diagnóstico clínico de afasia progressiva não-fluente quando evolui para degeneração córtico-basal deve apresentar uma forma específica de prejuízo cognitivo, incluindo as alterações motoras, refletindo uma distribuição neuroanatômica da doença no córtex frontal e temporal anterior e no núcleo denteado do cerebelo.

Palavras-chave:
afasia progressiva não-fluente; neuropsicologia; neuroimagem; neuropatologia e degeneração córtico-basal.

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Publication Dates

  • Publication in this collection
    Apr-Jun 2011

History

  • Received
    18 Mar 2011
  • Accepted
    20 May 2011
Academia Brasileira de Neurologia, Departamento de Neurologia Cognitiva e Envelhecimento R. Vergueiro, 1353 sl.1404 - Ed. Top Towers Offices, Torre Norte, São Paulo, SP, Brazil, CEP 04101-000, Tel.: +55 11 5084-9463 | +55 11 5083-3876 - São Paulo - SP - Brazil
E-mail: revistadementia@abneuro.org.br | demneuropsy@uol.com.br