Sensory dermatome by spinal level.
  • Fluid filled cyst (syrinx) within the spinal cord which can expand or elongate over time, destroying surrounding spinal cord tissue.
  • Can be due to dilation of the neural tissue surrounding the central canal itself (which can lead to obstructive hydrocephalus), or it can arise from within the parenchyma of the spinal cord.
  • Typically occurs in the C2 and T9 distribution.
  • Most commonly occurs in patients with a pre-existing Chiari malformation.
  • Usually seen in young adults
  • Most commonly insidious in onset but the effects of the cyst may manifest suddenly after coughing or sneezing


  • Congenital
    • Secondary to Arnold Chiari malformation
    • Associated with hydrocephalus
  • Acquired

Clinical Features

  • Insidious onset
  • "Cape-like" distribution of:
  • Stiffness of the back, shoulders, and extremities
  • Loss of ability to sense extreme hot or cold in the hands
  • Proprioception and vibration- spared due to sparing of the dorsal column and medial lemniscus

Differential Diagnosis


An idiopathic syrinx on MRI.


  • Ensure no respiratory involvement and consider intubation if severe
  • Analgesia


  • Assuming pain is controlled and no concern for respiratory compromise, discharge home.
  • Neurology follow-up- to create and monitor pain management plan
  • Neurosurgery- for potential surgical resection

See Also

External Links