<unk>  is a generic term referring to a disorder in which a cyst or cavity forms within the spinal cord. Often,<unk>  is used as a generic term before an etiology is determined. This cyst, called a syrinx, can expand and elongate over time, destroying the spinal cord. The damage may result in loss of feeling, paralysis, weakness, and stiffness in the back, shoulders, and extremities.<unk>  may also cause a loss of the ability to feel extremes of hot or cold, especially in the hands. It may also lead to a cape-like bilateral loss of pain and temperature sensation along the upper chest and arms. Each patient experiences a different combination of symptoms. These symptoms typically vary depending on the extent and, often more critically, on the location of the syrinx within the spinal cord.<unk>  has a prevalence estimated at 8.4 cases per 100,000 people, with symptoms usually beginning in young adulthood. Signs of the disorder tend to develop slowly, although sudden onset may occur with coughing, straining, or myelopathy.
Syringomyelia
Diastematomyelia
Posterior cord syndrome
Occipital horn syndrome
Surfer's myelopathy
Vascular myelopathy
Central cord syndrome
Amyotrophic lateral sclerosis