Pattern analysis of nerve enlargement using ultrasonography in chronic inflammatory demyelinating polyneuropathy

Jae Hong Jang, Charles S. Cho, Kyung Sook Yang, Hung Youl Seok, Byung Jo Kim

Research output: Contribution to journalArticle

41 Citations (Scopus)


Objective: Focal nerve enlargement is a characteristic finding in chronic inflammatory demyelinating polyneuropathy (CIDP). We performed this study to assess the distribution of nerve enlargement through ultrasonographic examination of peripheral nerves and to correlate the ultrasonographic findings with clinical features. Methods: To compare the ultrasonographic features of 10 subjects with CIDP with those of 18 healthy controls, we bilaterally measured the cross-sectional areas (CSA) of the vagus, brachial plexus, musculocutaneous, median, ulnar, radial, sciatic, tibial, common peroneal, and sural nerves. We also analyzed correlations between CSAs and various clinical and electrophysiological features. Results: Mean CSAs were significantly larger in CIDP patients than controls, especially at proximal and non-entrapment sites. CSAs were significantly correlated with muscle strength at initial presentation, but not at the time of ultrasonography. The CSAs of the median and ulnar nerves at the mid-forearm, tibial nerve at 7. cm proximal to the medial malleolus, and sural nerve correlated with the nerve conduction velocity of the corresponding region. Conclusion: Ultrasonography revealed widely distributed nerve enlargement, especially in proximal regions and non-entrapment sites, in patients with CIDP compared with healthy controls. Nerve enlargement correlated well with the electrophysiologic function of the nerve, but not current clinical status. Significance: Pattern analysis of nerve enlargement using ultrasonography is a supportive tool in the diagnosis of CIDP.

Original languageEnglish
Pages (from-to)1893-1899
Number of pages7
JournalClinical Neurophysiology
Issue number9
Publication statusPublished - 2014 Jan 1


  • Chronic inflammatory demyelinating polyneuropathy
  • Cross-sectional area
  • Ultrasonography

ASJC Scopus subject areas

  • Sensory Systems
  • Neurology
  • Clinical Neurology
  • Physiology (medical)

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