Transforaminal lumbar interbody fusion (TLIF) is a surgical technique that involves removing a disc from between two vertebrae and fusing the vertebrae together. This is done through a single incision in the back.
It is similar to a posterior lumbar interbody fusion (PLIF). The difference is that in a transforminal lumbar interbody fusion, the disc is removed from the side. In the posterior version, the disc is removed from the back.