I suffered from what was thought to be Pririformis syndrome a few years back. As part of the treatment I underwent multiple Steroid Injections at all levels of the lower spine, each in an attempt to isolate the area causing the pain. It wasn't until my Physical Therapist almost by accident pulled on my right leg, as I was out of alignment and almost instantly my hip popped. The pain went away almost immediately, something the injections never managed to do. With this in mind, I went to see my Orthopedic specialist, who requested and MRI of my right hip. Turns out I had a Femoral Acetabular Impingement (pistol grip deformity), Degeneration of the acetabular Labrum (Labrum Tear), & small paralabral Cyst. With this new information I was sent to a hip specialist who is a specialist in Arthroscopic Hip Procedures. Arthroscopic Hip surgery was performed and within 12 month (as expected), all pain was gone. This is a lesson learned for those of us who have suffered back and neck problem to make sure all avenues of approach have been researched and discovered. My back problem was not a back problem but a Hip problem that resulted in similar symptoms as Piriformis Syndrom and Sciatica. Had my hip not popped I might have, in an attempt to get rid of the pain, undergone unnecessary and very invasive back surgery.
Side note: I have undergone C5-C6, C6-C7 w/fusion and C7-T1w/Fusion surgeries, so the last thing I wanted was for the saw bones to be messing with my lower back.