The syrinx can span one or more spinal levels or even the entire length of the spinal cord, causing a variety of motor, sensory, and autonomic symptoms based on location. There are conflicting viewpoints regarding distinguishing these two entities based on clinical and radiographical features 2 versus classifying all cases under syringomyelia and distinguishing based on proposed pathogenesis. 1,2 These two terms have been used interchangeably in the literature and occasionally are combined as syringohydromyelia. Syringomyelia is a condition caused by a fluid-filled cavity, or syrinx, which forms within the spinal cord.Ī syrinx can refer to an abnormal gliotic-lined fluid-filled cavity located within the spinal cord parenchyma (syringomyelia) or a focal dilation of the central canal (hydromyelia).
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