What is chronic spondylolysis?

Spine defect: Spondylo means spine & lysis means crack. These can be congenital variety which is genetic in origin occuring in 6% of the us population or after trauma which can be repetitve particularly in certain high level athletes like swimmers, gymnasts, pitchers, football linemen most are treated non operatively. Chronic means that it is long standing & did not heal but may or may not be symptomatic.