title: Nerve ultrasound in a case of multifocal motor neuropathy without conduction block.
abstract: BACKGROUND
  Multifocal nerve enlargements and ultrastructural changes either corresponding or not to sites of existing conduction blocks have been described in demyelinating polyneuropathies using multiple imaging techniques.
  
  
  METHODS
  Using the emerging technique of peripheral nerve ultrasonography we investigated the peripheral nerves of a patient with multifocal motor neuropathy (MMN) without conduction block.
  
  
  RESULTS
  In this case of MMN without conduction blocks we found multifocal nerve enlargements in the ultrasonography and electrodiagnostic signs of acute and chronic denervation associated with positive anti-GM1 IgM antibodies.
  
  
  CONCLUSIONS
  This case shows that nerve ultrasound can be a complementary tool for diagnosing multifocal motor neuropathy without typical electrodiagnostic features.
authors.affiliation: Department of Neurology, St. Josef Hospital, Ruhr-University of Bochum, Gudrunstr. 56, 44791, Bochum, Germany.
authors.forename: Kalliopi
authors.initials: K
authors.lastname: Pitarokoili
authors.affiliation: Department of Neurology, St. Josef Hospital, Ruhr-University of Bochum, Gudrunstr. 56, 44791, Bochum, Germany.
authors.forename: Ralf
authors.initials: R
authors.lastname: Gold
authors.affiliation: Department of Neurology, St. Josef Hospital, Ruhr-University of Bochum, Gudrunstr. 56, 44791, Bochum, Germany.
authors.forename: Min-Suk
authors.initials: MS
authors.lastname: Yoon
mesh_terms: D000328:Adult; D001917:Brachial Plexus / Q000000981:diagnostic imaging*; D005260:Female; D006801:Humans; D009431:Neural Conduction / Q000502:physiology; D011115:Polyneuropathies / Q000000981:diagnostic imaging* / Q000503:physiopathology; D013979:Tibial Nerve / Q000000981:diagnostic imaging*; D014463:Ultrasonography
keywords: conduction block; immune-mediated neuropathies; multifocal motor neuropathy; nerve hypertrophy; nerve ultrasonography