If your talking about a syrinx, its a is a fluid filled spinal cyst, treatments vary from one patient to the other depending on the severity. Some people are treated with shunts that can direct the fluid to the abdominal cavity where it can be re-absorbed, others might need surgery.Not all syrinxes are problematic and asymptomatic patients with small syrinx cavities can be managed by watching and with frequent imaging exams.
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It is actually called degenerative lumbosacral disc. It is a degenerative disc disease that develops over time and with age.
Check out the website below for further explaination.
http://www.spine-health.com/conditions/degenerative-disc-disease/lumbar-degenerative-disc-disease