"post-inflammatory"
"T1: hypointense"
"T2: hyperintense, although there may be hypointense regions representing flow or pulsation artifact"
"Congenital causes include:"
"Acquired (secondary) causes include:"
"Chiari 1 malformation"
"Chiari 2 malformation"
"Dandy-Walker malformation"
"syringomyelia: cavitary lesion within cord parenchyma, of any cause (there are many); located adjacent to the central canal, therefore not lined by ependyma"
"post-traumatic: occurs in ~5% of patients with spinal cord injury, usually from a whiplash-type injury; symptoms may start many months or years after an injury"