Cervical spondylotic amyotrophy (CSA)

Written and reviewed by Dr Ibrahim Imam, Consultant Neurologist. Last reviewed .

Cervical spondylotic amyotrophy (CSA). This is isolated lower motor neurone weakness caused by spinal cord compression.

Pathogenesis

  • This is isolated lower motor neurone weakness caused by spinal cord compression
  • It is due to selective degeneration of the anterior horn cells from vascular insufficiency
  • It may also arise from isolated compression of the motor nerve roots

Proximal type

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Distal type

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Clinical features

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Examination signs

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Magnetic resonance imaging (MRI) spine: features

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Electromyogram (EMG): features

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Differential diagnosis

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Surgical treatment

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References

  1. Jiang SD, Jiang LS, Dai LY. Cervical spondylotic amyotrophy. Eur Spine J 2011; 20:351-357.
  2. Ahdab R, Créange A, Benaderette S, Lefaucheur JP. Cervical spondylotic amyotrophy presenting as dropped head syndrome. Clin Neurol Neurosurg 2009; 111:874-876.
  3. Taniguchi S, Takahashi H, Aoki Y, et al. Surgical treatment for dropped head syndrome with cervical spondylotic amyotrophy: a case report. BMC Res Notes 2018; 11:500.
  4. Gebere-Michael SG, Johnston JC, Metaferia GZ, Wuhib MZ, Fernandez HH. Bilaterally symmetric cervical spondylotic amyotrophy: a novel presentation and review of the literature. J Neurol Sci 2010; 290:142-145.
  5. Isobe T, Yaguchi H, Matsui K, Inoue K. A case of cervical spondylotic amyotrophy resembling post-polio syndrome. Rinsho Shinkeigaku 2006; 46:59-61.
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