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The MRI sequences demonstrate a moderate narrowing of L4-L5 disc space with a low signal T1, high signal on T2/STIR of the L4, and L5 vertebral bodies with enhancement on postcontrast sequences indicating bone marrow oedema. There is an intradiscal abscess extending to the neighbouring endplates with thickening and enhancement of the pre/paravertebral and anterior epidural spaces containing small abscess formations. A mass effect is noted on the thecal sac which is displaced posteriorly.