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. 2020 Jul 23;56(1):9–17. doi: 10.1055/s-0040-1712490

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Sociedade Brasileira de Ortopedia e Traumatologia. This is an open access article published by Thieme under the terms of the Creative Commons Attribution-NonDerivative-NonCommercial License, permitting copying and reproduction so long as the original work is given appropriate credit. Contents may not be used for commecial purposes, or adapted, remixed, transformed or built upon. ( https://creativecommons.org/licenses/by-nc-nd/4.0/ )

This is an open-access article distributed under the terms of the Creative Commons Attribution-NonCommercial-NoDerivatives License, which permits unrestricted reproduction and distribution, for non-commercial purposes only; and use and reproduction, but not distribution, of adapted material for non-commercial purposes only, provided the original work is properly cited.

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Fig. 2 — (A) Axial magnetic resonance imaging (MRI) showing spinal stenosis with ligamentum flavum thickening (1), facet arthrosis with synovitis (2) and disc protrusion (3). (B) Sagittal computed tomography (CT) scan showing L1-L2-L3-L4 spinal stenosis. (C) Surgical photography: three-level decompression using the conventional laminectomy technique plus lateral recess resection and bilateral foraminotomy. (D) Sagittal MRI showing degenerative L3-L4 and L4-L5 stenosis with degenerative spondylolisthesis in L4-L5.