see also:

• syringomyelia
• weakness of the lower limb(s) / weak in the knees

• a rare condition in which fluid filled cavities (syrinxes) occupy space in the lower part of the brainstem and can impair neuronal function via a pressure effect similar to that seen in syringomyelia with which it is often associated with

• may be caused by a birth defect, trauma or tumour growth

• may cause:
  • neuropathic pain
  • loss of temperature sensation
  • central type II respiratory failure (raised CO2, hypoventilation)
  • impaired muscle control of airways causing stridor and irregular breathing

• MRI brain