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2.5 cm fragment of sequestered L5/S1 disc, lying at the level of the disc space and extending caudally to the S1/S2 disc level. This occupies the majority of the spinal canal with severe compression of the thecal sac and the distal cauda equina. The right S1 descending nerve root is compressed in the lateral recess.
Insignificant diffuse disc bulge at L4/L5.