Lumbar Laminectomy (Decompression)
Lumbar laminectomy is a decompression operation in which the bony lamina and related tissue compressing the neural structures in the lower spine are removed from the back (posterior approach) to widen the spinal canal. It is most often performed for leg pain and walking limitation due to lumbar spinal stenosis.
Laatst bijgewerkt: 2026-06-08
Definition
Laminectomy is the complete or partial removal of the bony roof behind a vertebra, called the lamina. The goal is to relieve pressure on the nerve roots and the dural sac compressed within a narrowed spinal canal; the procedure is therefore classified as a posterior decompression. It may be performed at a single level or multiple levels and may be combined with limited variants such as laminotomy (partial opening) or facetectomy. Laminectomy alone provides decompression and does not include fusion or instrumentation, although these may be planned together in selected cases.
Indications
The most common indication is neurogenic claudication (leg pain or numbness worsening with walking) due to lumbar spinal stenosis demonstrated on imaging in patients who have not responded to adequate conservative treatment. Central or lateral recess stenosis, ligamentum flavum hypertrophy and degenerative compressive changes are assessed. Clinical findings are expected to correlate with imaging; radiological narrowing alone is not an indication for surgery. Progressive neurological deficit or cauda equina syndrome requires urgent evaluation.
Procedure
The procedure is usually performed under general anesthesia in the prone position. Through a midline incision the paraspinal muscles are retracted to expose the lamina of the target level; the lamina, ligamentum flavum and, where needed, the medial facet edge are removed to widen the canal. Under a microscope or magnification the nerve roots and dural sac are freed. Minimally invasive or tubular approaches may allow smaller incisions; in cases at risk of instability, whether to add fusion to the decompression is evaluated separately.
Advantages and Limitations
In appropriately selected stenosis cases, decompression can relieve leg pain and improve walking capacity, and it is a well-established, well-defined technique. Wide open laminectomy removes part of the posterior structures that stabilize the spine and may, in some patients, increase the risk of instability or progressive deformity; bone-sparing and minimally invasive techniques have therefore been developed. The technique does not always relieve mechanical back pain and may be insufficient alone in the presence of instability or significant deformity. Suitability varies with the patient's anatomy and pathology.
Recovery and Risks
Recovery time varies by patient, the number of levels and whether additional procedures are performed. Possible risks include infection, dural tear and cerebrospinal fluid leak, nerve root injury, bleeding, epidural hematoma and, over time, instability or adjacent-segment problems. Symptoms may not fully resolve in every case and recurrence can occur. No outcome is guaranteed; the decision is made individually by considering the patient's clinical status together with imaging findings.
Bronnen
- Greenberg MS. Greenberg's Handbook of Neurosurgery. 10th ed. Thieme; 2023:1328.
- Winn HR, ed. Youmans Neurological Surgery. 6th ed. Saunders; 2011:2923.
- Weinstein JN, et al. Surgical versus nonsurgical treatment for lumbar spinal stenosis (SPORT). N Engl J Med. 2008.
Dit artikel dient als algemene informatie en vervangt geen medisch onderzoek. Beslissingen over diagnose en behandeling zijn individueel.