6% of the US : Population have this issue with 50% going undiagnosed & asymptomatic with the other 50%, 90% of the remaining group managed non surgically with bracing, exercise & medication. 10% end up with a fusion with 90% of them doing well. This is the isthmic variety . Another type is degenerative related with 70 % treated non operatively.
Answered 1/31/2015
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