What is the role of muscular dystrophies in the etiology 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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Muscular dystrophies

  • FMA also may be a feature in certain muscular dystrophies.

  • In fascioscapulohumeral dystrophy, the arms have a "Popeye" appearance with preservation of the forearms and marked wasting of the upper arms.

  • In limb girdle dystrophy, wasting of the upper portion of the deltoid with preservation of lower portion gives an unusual muscle configuration.

  • In myotonic dystrophy, wasting of the temporalis and masseter muscles and atrophy of the neck muscles may occur.

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