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Subacute sclerosing panencephalitis. Clinical aspects and prognosis. The Brazilian registry

M L Nunes1, J C Da Costa, V M Stancher

  • 1Serviço de Neurologia, Hospital São Lucas da PUCRS, Porto Alegre RS, Brasil. magdalahorgue@conex.com.br

Arquivos De Neuro-Psiquiatria
|July 21, 1999
PubMed

Insights

Subacute sclerosing panencephalitis (SSPE) remains a concern, with Brazilian data revealing endemic regions and a significant delay in diagnosis. The study highlights a notable incidence of SSPE following measles immunization.

Area of Science:

  • Neurology
  • Epidemiology
  • Virology

Background:

  • Subacute sclerosing panencephalitis (SSPE) is a rare, progressive neurological deterioration linked to persistent measles virus infection.
  • While measles eradication efforts have reduced SSPE incidence, sporadic cases continue to emerge globally.
  • Understanding the current epidemiological landscape of SSPE is crucial for public health strategies.

Purpose of the Study:

  • To delineate the epidemiological characteristics of SSPE cases in Brazil.
  • To identify geographical hotspots and demographic patterns of SSPE.
  • To analyze diagnostic delays and outcomes in Brazilian SSPE patients.

Main Methods:

  • A nationwide protocol was distributed to Child Neurologists across Brazil.
  • Data from 48 registered SSPE patients were collected and analyzed.
  • Epidemiological variables, clinical presentation, diagnostic markers (EEG), and patient outcomes were documented.

Main Results:

  • The Southeast region accounted for 56% of cases; 71% of patients were male and 73% were white.
  • Measles infection preceded SSPE in 56% of cases, while 19% had prior measles and immunization, and 14% were immunized only.
  • The mean time from symptom onset to diagnosis was 12 months, with 75% exhibiting characteristic EEG pseudoperiodic complexes; outcomes varied, including death, remission, and disability.

Conclusions:

  • Brazil exhibits endemic regions for SSPE, underscoring the need for continued surveillance.
  • A significant proportion of SSPE cases occur post-immunization, warranting further investigation into vaccine-related factors or waning immunity.
  • The substantial delay between symptom onset and diagnosis indicates challenges in early SSPE detection and management.

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