Minimally Invasive Surgery- Transforaminal Lumbar Interbody Fusion. Then 2 means I had it two months after the last epidural. Fusion at L5-S 1 . Ruptured disk, spondylosthesis (not sure on spelling but it’s a common issue), arthritis, scoliosis, yada yada. I tried everything for 18 months but when the mid April shot didn’t work and, more importantly, I couldn’t walk :-), I had surgery. Honestly, no where near as bad an experience as I thought— and appears to have worked, still sore from surgery but I’m walking normally ,