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Patient with low back pain. a, c) Sagittal and axial T2-weighted images with Fat Saturation; b, d) Sagittal and axial T1-weighted images with Fat Saturation following contrast medium administration; e) axial CT image on L4. Mild anterolisthesis of L4 over L5 (a-b), with spondylolysis of L4 (e, asterisks). Note also the intraspinal synovial cyst (c, d arrowheads) and the neo-/pseudocyst in the epidural space of the posterior aspect of the central spinal canal (a-d, arrows)
