What are the most frequent causes of focal muscular atrophy (FMA)?

Updated: Feb 20, 2018
  • Author: Sridharan Ramaratnam, MD, MBBS; Chief Editor: Helmi L Lutsep, MD  more...
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The most frequent causes of FMA are the following. A brief discussion of some of the most common causes follows this list.

  • Disuse atrophy

  • Traumatic root lesions, plexus injuries, brachial and lumbosacral plexopathies

  • Mononeuropathy due to trauma, diabetes, vasculitis, infection (leprosy), or entrapment

  • Polio, PPMA, monomelic amyotrophy, early motor neuron disease, variants of SMA, and syringomyelia

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