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Updated: Jun 5, 2026

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Brain abnormalities in neuromyelitis optica.

Jee-Eun Kim1, Sung-Min Kim, Suk-Won Ahn

  • 1Department of Neurology, Seoul National University Hospital, Seoul National University College of Medicine, Seoul, Republic of Korea.

Journal of the Neurological Sciences
|January 18, 2011
PubMed
Summary
This summary is machine-generated.

Brain MRI abnormalities are common in Korean neuromyelitis optica (NMO) patients, often showing nonspecific or atypical findings. Current multiple sclerosis (MS) criteria are insufficient for differentiating NMO from MS based on brain MRI.

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Area of Science:

  • Neuroscience
  • Radiology
  • Immunology

Background:

  • Differentiating neuromyelitis optica (NMO) from multiple sclerosis (MS) presents clinical challenges.
  • Historically, NMO diagnosis involved normal brain MRI, but recent studies show brain abnormalities in NMO patients, particularly in Asian populations.
  • This study aimed to assess brain MRI findings in Korean NMO patients to aid in distinguishing NMO from MS.

Purpose of the Study:

  • To evaluate the frequency and characteristics of brain MRI abnormalities in Korean patients diagnosed with NMO.
  • To identify potential MRI findings that could help differentiate NMO from MS in this population.
  • To contribute to the revision of diagnostic criteria for NMO.

Main Methods:

  • Retrospective review of medical records, NMO-IgG status, and brain MRI scans from 17 Korean patients diagnosed with NMO (2008-2010).
  • Diagnosis of NMO was based on the revised 2006 Wingerchuk et al. criteria.
  • Analysis of MRI findings including lesion location, number, and characteristics, and assessment against established MS criteria (Paty et al. 1988, Barkhof et al. 1997).

Main Results:

  • 11 out of 17 (64.7%) Korean NMO patients exhibited abnormal brain MRI findings, often with multiple lesions.
  • The majority of brain MRI abnormalities were nonspecific (5 patients) or atypical (6 patients).
  • Commonly affected areas included cerebral white matter (58.8%), corpus callosum (17.6%), internal capsule (23.5%), cerebellum (11.8%), and brainstem (17.6%).
  • A significant proportion met MS spatial distribution criteria: 29.4% met Paty et al. criteria and 35.3% met Barkhof et al. criteria.

Conclusions:

  • Brain abnormalities are frequently observed in Korean NMO patients, with reported frequencies potentially higher than in Caucasian populations.
  • Existing MS spatial distribution criteria (Paty et al., Barkhof et al.) are inadequate for reliably distinguishing NMO from MS based on brain MRI.
  • The study's findings offer valuable insights for future revisions of NMO diagnostic criteria.