I believe it depends on the severity of the syringomyelia.
I had my first shunt put in at 27yrs of age in Chicaho in 1992, in the cervical spine. Then after losing a great deal of weight at the age of 40yrs of age in 2005, I started to develop weakness in my legs, so I knew something was wrong, I went to the Mayo clinic in Rochester, MN and they put a shunt in my thoracic spine, it partially clogged right after they put it in, but it still took pressure off of the spinal cord, so I left it alone. It's now 2022, 30 years after my initial shunt surgery and I'm experiencing new symptoms, my left leg is very weak and my leg refuses to straighten out, I just know something is going on in my lumbar spine, I never wanted another surgery, but I may not have a choice. But I'm still fighting this disorder, it started in Chicago in 1992 and now I'm in Minnesota 2022 and still kicking. God bless anyone dealing with a traumatic issue.