Syringomyelia. Coloured magnetic resonance imaging (MRI) scan of a sagittal section through the neck of a patient suffering from syringomyelia. This is a condition in which fluid-filled cavities develop in the spinal cord. The patient's head is at top; the jaw (orange) at upper left; the windpipe is blue. The spinal cord is light green running from top to bottom, with vertebrae (orange) to its left. At centre in the spinal cord is a cavity (orange) due to syringomyelia. The cavity causes damage to nerves reducing sensations of pain and temperature, and causing weakness and wasting of muscles in the neck, shoulders, arms and hands. This rare condition is progressive.
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