XLIF / DLIF
Extreme Lateral Interbody Fusion (XLIF) or Direct Lateral Interbody Fusion (DLIF) is a minimally invasive spinal fusion technique performed through the patient's side (lateral approach). By accessing the lumbar spine laterally, the surgeon can avoid cutting through major back muscles or disturbing the spinal cord and sensitive nerves in the canal, enabling exceptionally large spacers to be inserted for superior height restoration and stability.
When this procedure may be recommended
- Lumbar spinal stenosis accompanied by degenerative spondylolisthesis or scoliosis.
- Degenerative disc disease with severe mechanical low back pain.
- Mild-to-moderate spinal deformities (e.g., degenerative scoliosis) requiring structural realignment.
- Adjacent segment disease years after a previous posterior spinal fusion.
Who may be a candidate
Candidates are patients with lumbar spinal pathology at levels L1-L2, L2-L3, L3-L4, or L4-L5. Due to pelvic anatomy (iliac crest), the L5-S1 segment cannot be accessed via a lateral approach. Patients with severe stenosis requiring direct posterior decompression or prior retroperitoneal surgeries may require alternative approaches.
Advanced medical implant technology (no text). Alternatives to surgery
- Traditional open posterior lumbar fusion (TLIF/PLIF).
- Anterior lumbar interbody fusion (ALIF) from the front.
- Structured physical therapy, core conditioning, and pain-management injections.
What to expect
- Positioning: The patient is placed on their side (lateral decubitus position) on a specialized operating table.
- Access: A small incision (typically 3-4 cm) is made on the flank/side of the body.
- Nerve Monitoring: A surgical dilator is gently passed through the psoas muscle, utilizing continuous electromyographical (EMG) nerve tracking to ensure safe passage away from the lumbar plexus nerves.
- Disc Removal: The degenerated disc is completely cleared out and the vertebral bone surfaces are prepared.
- Cage Insertion: A wide lateral fusion spacer (cage) filled with bone graft material is inserted, stretching the ligaments to decompress nerves indirectly.
- Stabilisation: Supplementary percutaneous pedicle screws or a lateral plate are typically secured to provide rigid stability.
Technology and imaging
Employs real-time intraoperative EMG nerve monitoring, specialized lateral access retractors, and intraoperative fluoroscopy.
High-precision diagnostic imaging visualization. 
Clinical Zeiss/Leica operating microscope setup. Hospital stay
Typically 1 to 2 nights, allowing rapid recovery of mobility and minimal post-operative pain.
Recovery milestones
- Day 1: Mobilisation with physical therapy. Most patients are walking hours after the procedure.
- Weeks 1-4: Light home activities and regular walking. Strict restriction on bending, lifting, and twisting.
- Weeks 6+: Return to desk work, progressive core-strengthening physical therapy, and gradual return to normal duties.
Post-operative mobilization and recovery milestones. Risks and complications
- Transient thigh numbness or hip flexor weakness due to psoas muscle passage (usually resolving in weeks).
- Lumbar plexus nerve injury (extremely low with continuous neuromonitoring, under 1%).
- Non-union (pseudoarthrosis) where bone fails to fuse.
- Persistent pain or hardware complications.
Frequently asked questions
Why is a lateral fusion chosen over a posterior fusion?
The lateral approach allows the surgeon to use a much wider spacer, which provides superior support and structural realignment while completely avoiding the major back muscles and nerves, resulting in less post-operative pain and faster recovery.