Hi there, I am new to this board. I too had a spinal leak which happened after I had a L5-S1 PLIF. Thank God it happened only 2 days after surgery, so I was still in the Hospital. My neurosurgeon brought me back into the OR, reopened my back, and attempted to suture the leak, but he couldn't because the tissue was so thin. He wound up taking muscle from my back, glued and sutured it over the leak, and it worked. He said he was so happy it worked because the leak was massive. I hope this helps you. My surgery was in Nov. of '06, but unfortunately it is a failed fusion. I will be having a revision. Hasn't been scheduled yet, but the surgeon will use bone from my hip this time, and will go in through the back, and the front. Here we go again! kathyk