Which brachial and lumbosacral plexus lesions cause focal muscular atrophy (FMA)?

Updated: Feb 20, 2018
  • Author: Sridharan Ramaratnam, MD, MBBS; Chief Editor: Helmi L Lutsep, MD  more...
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Brachial and lumbosacral plexus lesions

  • Malignant invasion

  • Thoracic outlet syndrome

  • Trauma

  • Obstetric injuries

  • Tomaculous plexopathy

  • Psoas hemorrhage due to anticoagulants or other causes

  • Psoas abscess

  • Radiation

  • Brachial neuritis (neuralgic amyotrophy)

  • Familial brachial plexopathy

  • Diabetes

  • Vasculitis

  • Intraarterial injections (gluteal and iliac arteries)

  • Herpes zoster

  • Idiopathic lumbosacral plexopathy

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