Highlights
The achievement of a proper circumferential decompression of the sac instead of simple posterior bilateral laminectomy has been progressively highlighted.
Since the majority of spinal cord compression involves firstly the ventral part of the sac, circumferential and anterior decompression are associated with better neurological outcomes at discharge and at follow-up, and should be achieved in case of circumferential or anterior/anterolateral compression.
Post-operative improvement and/or maintenance of ambulation resulted to be a significative protective factor at last follow-up.
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