Hello all.. I have posted before regarding my problems, yet now I am more confused than ever.. I have had a l5-s1 TLIF 1 yr ago and achieved some relief in my low mid back and about 70% in sciatica in my left leg. I had DDD, and severe annular tear at that level and it was confirmed as a pian generator through discogram. Jump forward to July of this year. Met with neurosurgeon and explained yet again the increased pain in my left low back to the side of my spine and into my buttocks and groin. He said well I will send u back to PM I believe u may have had SI Joint issues all along and we under estimated the severity. But u also needed the fusion at the l5-s1 level due to the severity of the pain u were having and all looks well as far as union at that level. I return to PM and they do the initial injection with lidocaine and I got immediate relief for 6 hrs and the pain gradually returned. 2 weeks later another injection this time with cortisone. Immediate relief and within 2 weeks the severe pain had returned. Next a diagnostic nerve block was done with lidocaine on the lateral branch nerves. This was painful and eased when numbed and the pain returned. The PM said I am confident this is your problem and a RFA will help since those nerves responded to the block. So 4 weeks ago I do the ablation. Despite the pain after I assume it will get better.. Well now I am in just as much pain as before and have an even tougher time rising from sitting, turning over in bed. So here's why I am so confused and really annoyed. I have had relief with all the injections etc but short term and was told the RFA would ease the pain. Well since it's been over 1 month since the ablation the PM has sent me back to a neurosurgeon in the same group who specializes in SI Joint fusions. 1st of all how is it possible to get the relief I have gotten yet to only return if they are so positive this is my prominent pain source? Is this common? They are gonna run tests for HLA-B27 to see if some of it's auto immune? Okay why hadn't this been done before now? If it's positive and they think that's one issue will the fusion help the pain there yet get worse somewhere else? The fusion would be with SI_Bone I fuse which I have had a friend have and gotten good results 1.5 yr post op. I meet the surgeon tomorrow and really don't know what to say. What ?? to ask etc. Can anyone help with all this boggled up anger and lack of answers? Any one had the IFuse done and had negative results? Any advise or answers would be appreciated. Thank You!!