Biportal Endoscopic Transforaminal Interbody Fusion for Lumbar Adjacent Segment Disease: An Illustrative Case and Literature Review

Posterior lumbar fusion surgery is a well-established procedure for treating degenerative lumbar spine diseases. Despite its surgical success over the decades, adjacent segment degeneration persisted as a problem, causing significant morbidity in patients. Various surgical fusion techniques, including open and minimally invasive procedures, have been reported for treating adjacent segment disease. Recently, endoscopic lumbar interbody fusion, including fully endoscopic lumbar interbody fusion through the uniportal approach and biportal endoscopic transforaminal lumbar interbody fusion (BE-TLIF), has been attempted as a minimally invasive surgical technique for lumbar fusion. This study describes the BE-TLIF technique and presents a review of the literature on this technique for treating adjacent segment disease. Our case illustration demonstrates that BE-TLIF could be a viable minimally invasive technique for addressing adjacent segment disease in revision lumbar spinal fusion surgery.