Relieving pressure.
Decompression creates more room for compressed nerves by removing the tissue causing pressure. It may be performed using different approaches, including endoscopic techniques in selected situations.
Addressing stability or painful motion.
Fusion joins vertebrae so that they heal together. Its purpose can include restoring stability or treating a carefully identified source of painful motion. Some operations combine decompression with fusion.
Ask about the reason, not just the size.
A small access route does not make these goals interchangeable. The recommendation should explain why decompression alone may or may not be sufficient, which alternatives are reasonable and what risks accompany the proposed operation.
Sources and further reading
Clinical background checked October 22, 2026. General education; an individual recommendation requires an evaluation.
AAOS OrthoInfo: Spinal Fusion AAOS OrthoInfo: Minimally Invasive Spine Surgery