• syrinx
  • citation needed] Papilledema on fundoscopic exam due to Increased intracranial pressure Pupillary dilation Dysautonomia: tachycardia (rapid heart), syncope (fainting), polydipsia (extreme thirst), chronic fatigue The blockage of cerebrospinal fluid (CSF) flow may also cause a syrinx to form, eventually leading to syringomyelia. (wikipedia.org)