1. What is L3-4: Severe central stenosis via the anterolisthesis, small diffuse disc bulge, and severe bilateral facet arthrosis with ligamentum flavum hypertrophy. Mild left neural foraminal narrowing via the facet arthrosis. How is it typically treated? 2. What is L4-5: Severe central stenosis via anterolisthesis, small, diffuse disc bulge, ligamentum flavum hypertrophy, and severe bilateral facet arthropathy. Mild left neural foraminal narrowing is present via the disc bulge and facet arthropathy? How is it typically treated?