The exact location of the syrinx, size, cause, and clinical exam and history would need to be evaluated to determine if a surgery is necessary. A surgery to treat this would either involve opening the cord and allowing the fluid in the space to drain, or placing a physical drain in the syrinx. The consequences of surgery could include injuring the spinal cord, or the surgery may not help with the symptoms. Without having the above information I cannot be more specific. Good luck