What are the supportive criteria for multifocal motor neuropathy (MMN) with conduction block?

Updated: Nov 12, 2018
  • Author: Sasa Zivkovic, MD, PhD; Chief Editor: Nicholas Lorenzo, MD, MHA, CPE  more...
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Answer

Supportive criteria, as follows:

  • Elevated titers of serum IgM anti-GM1 antibodies

  • Increased cerebrospinal fluid (CSF) protein (< 1 g/L)

  • MRI shows increased signal on T2-weighted imaging of brachial plexus with diffuse nerve swelling

  • Objective clinical improvement following intravenous immunoglobulin (IVIG) treatment


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