Ozgur et al. introduce the Extreme Lateral Interbody Fusion (XLIF) technique — a lateral retroperitoneal, trans-psoas corridor to the anterior lumbar disc space. The paper describes the step-by-step technique and reports the authors' initial 13-patient experience. The central question: is this corridor feasible, and does it avoid the morbidity of anterior transperitoneal and laparoscopic approaches?
Before XLIF, getting anterior access to the lumbar disc space meant either open or laparoscopic anterior surgery — both requiring a vascular or general surgery access surgeon, great vessel mobilization, and exposure to retrograde ejaculation risk from hypogastric plexus disturbance.
XLIF changed that calculus. For a patient with discogenic back pain at L2–L4 who has failed 6 months of conservative care and lacks severe stenosis or moderate-to-severe spondylolisthesis, the lateral trans-psoas corridor gives you anterior disc access through two small incisions with no access surgeon, no peritoneal entry, and no great vessel retraction.
Know two numbers cold: the approach is limited to L1–L5 (not L5–S1), and you need an intraoperative EMG threshold above 10 mA throughout trans-psoas dilation to confirm safe distance from the lumbar plexus.
This paper is the foundational description of what became a major category of minimally invasive spine surgery. The technique was originally reported by Pimenta in 2001 and formalized here. Subsequent work extended its indications to low-grade spondylolisthesis and adult degenerative lumbar scoliosis.
Ozgur et al. introduce the Extreme Lateral Interbody Fusion (XLIF) technique — a lateral retroperitoneal, trans-psoas corridor to the anterior lumbar disc space. The paper describes the step-by-step technique and reports the authors' initial 13-patient experience. The central question: is this corridor feasible, and does it avoid the morbidity of anterior transperitoneal and laparoscopic approaches?
Before XLIF, getting anterior access to the lumbar disc space meant either open or laparoscopic anterior surgery — both requiring a vascular or general surgery access surgeon, great vessel mobilization, and exposure to retrograde ejaculation risk from hypogastric plexus disturbance.
XLIF changed that calculus. For a patient with discogenic back pain at L2–L4 who has failed 6 months of conservative care and lacks severe stenosis or moderate-to-severe spondylolisthesis, the lateral trans-psoas corridor gives you anterior disc access through two small incisions with no access surgeon, no peritoneal entry, and no great vessel retraction.
Know two numbers cold: the approach is limited to L1–L5 (not L5–S1), and you need an intraoperative EMG threshold above 10 mA throughout trans-psoas dilation to confirm safe distance from the lumbar plexus.
This paper is the foundational description of what became a major category of minimally invasive spine surgery. The technique was originally reported by Pimenta in 2001 and formalized here. Subsequent work extended its indications to low-grade spondylolisthesis and adult degenerative lumbar scoliosis.