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Bilateral thoracic long nerve involvement in motor multifocal neuropathy
  1. Marco Luigetti1,
  2. Alessandro Cianfoni2,3,
  3. Serenella Servidei1,
  4. Massimiliano Mirabella1
  1. 1Department of Geriatrics, Neurosciences & Orthopedics, Institute of Neurology, Catholic University of Sacred Heart, Rome, Italy
  2. 2Department of Neuroradiology, Neurocenter of the Southern Switzerland, Civic Hospital (EOC), Lugano, Switzerland
  3. 3Neuroradiology Section, Radiology Department, Medical University of South Carolina, Charleston, South Carolina, USA
  1. Correspondence to Dr Marco Luigetti, Department of Geriatrics, Neurosciences & Orthopedics, Institute of Neurology, Catholic University of Sacred Heart, Largo A Gemelli 8, Roma 00168, Italy; mluigetti{at}gmail.com

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A 20-year-old man presented with a 6-month history of progressive weakness in the right hand.

Neurological examination showed a bilateral weakness of hand muscles more pronounced in the right hand, slight scapula winging and no sensory disturbances. Nerve conduction studies showed motor conduction blocks in the median and ulnar nerves bilaterally (figure 1), with normal sensory conduction studies, suggesting a motor multifocal neuropathy (MMN). Somatosensory evoked potentials from …

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