question: Hello, I am a 42 year old with history of L5-S1 PSFI almost a year ago.  Symptoms are still present.  Back pain as well as left hip bursitis and pain shooting to my left knee and sometimes down to the shin area.  I saw my surgeon who is concerned that I may have an issue with the instrumentation.  Not infection, rather my body \"not being able to adjust to it\".  I had a CT scan recently which showed the following