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Figure 5: Sagittal T2-weighted (a) and axial T2-weighted (b) images at L4-L5 level demonstrating paracentral disc extrusion with caudal migration (star) causing compression of left traversing nerve roots. Axial T2-weighted image at L5-S1 level demonstrating diffuse (c) and central disc bulge (d) with bilateral lateral recess and neural foraminal narrowing. Note fatty infiltration of bilateral paraspinal muscles (arrows) suggesting atrophy. Axial T2-weighted image (e) at L4-L5 disc level demonstrating a central annular tear (arrow). Axial T2-weighted image (f) at L5-S1 disc level demonstrating ligamentum flavum thickening (arrows) with lumbar canal stenosis (star). Axial 3D FIESTA image (g) at L4-L5 disc level demonstrating bilateral facetal joint arthropathy (stars). Axial T2-weighted image (h) at L5-S1 disc level demonstrating a left juxtafacetal synovial cyst (arrow)

Figure 5: Sagittal T2-weighted (a) and axial T2-weighted (b) images at L4-L5 level demonstrating paracentral disc extrusion with caudal migration (star) causing compression of left traversing nerve roots. Axial T2-weighted image at L5-S1 level demonstrating diffuse (c) and central disc bulge (d) with bilateral lateral recess and neural foraminal narrowing. Note fatty infiltration of bilateral paraspinal muscles (arrows) suggesting atrophy. Axial T2-weighted image (e) at L4-L5 disc level demonstrating a central annular tear (arrow). Axial T2-weighted image (f) at L5-S1 disc level demonstrating ligamentum flavum thickening (arrows) with lumbar canal stenosis (star). Axial 3D FIESTA image (g) at L4-L5 disc level demonstrating bilateral facetal joint arthropathy (stars). Axial T2-weighted image (h) at L5-S1 disc level demonstrating a left juxtafacetal synovial cyst (arrow)