What is syringohydromyelia?

Answer 1

Sometimes CSF (Cerebral Spinal Fluid) is squeezed downward, forced into the spinal cord itself where this fluid does not belong, creating the long blister-like syrinx of syringomyelia [Ed Note: the actual mechanism underlying syrinx formation is not well understood]. Occasionally, the syrinx will form in the central canal of the cord, causing a dilation of the canal known as hydromyelia. The combination of both of these is sometimes termed syringohydromyelia.