What is the role of congenital absence of muscle 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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Congenital absence of muscle (although not an atrophy in a strict sense) may result in focal thinning.

  • It may be unilateral or bilateral, limited to a single muscle or group of muscles.

  • The course is stationary.

  • The most commonly missing muscles include the pectoralis, trapezius, serratus, and quadriceps.

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