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Seeing the blocks: MRI of the brachial plexus in multifocal motor neuropathy
  1. Andoni Echaniz-Laguna1,
  2. Jean-Louis Dietemann2
  1. 1Département de Neurologie, Hôpitaux Universitaires, Strasbourg, France
  2. 2Département de Radiologie, Hôpitaux Universitaires, Strasbourg, France
  1. Correspondence to Andoni Echaniz-Laguna, Département de Neurologie, Hôpital Civil, BP 426, 67091 Strasbourg, France; andoni.echaniz-laguna{at}chru-strasbourg.fr

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Case summary

A 45-year-old man presented with 3 months of progressive right hand weakness. Examination showed mild atrophy and weakness of the right hand, and absent tendon reflexes. Cerebrospinal fluid contained 0.42 g/l protein (normal <0.45) and 1 lymphocyte/mm3. Electrodiagnostic studies revealed a multifocal motor neuropathy (MMN) with partial conduction blocks and severe denervation in the muscles of the right hand (figure 1). Sensory nerve conduction studies were normal. Charcot–Marie–Tooth disease, distal demyelinating polyneuropathy associated …

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