 There is grade 1 anterolisthesis of L3 on L4. There is increased T2 signal intensity in the bilateral L3 pars, which raises concern for a pars fracture. There is also increased T1 signal in the bilateral pars, which may be related to associated fatty change. There is disc desiccation at L3-L4 through L5-S1. The conus is normal in signal and morphology and terminates at the L2 level. The visualized intra-abdominal and paraspinal contents are unremarkable.T12/L1: No significant spinal canal or neuroforaminal narrowing.L1/2: No significant spinal canal or neuroforaminal narrowing.L2/3: No significant spinal canal or neuroforaminal narrowing.L3/4: There is a left paracentric disc extrusion with 1.5 cm of cranial migration. No sequestration. There is resultant partial effacement of the left lateral recess. There is moderate left neuroforaminal narrowing with possible impingement of the L3 nerve root and mild right neuroforaminal narrowing. There is mild facet arthrosis. There is minimal spinal canal narrowing at this level.L4/5: There is minimal central disc protrusion without significant spinal canal or neuroforaminal narrowing. L5/S1:No significant spinal canal or neuroforaminal narrowing.
1.Grade 1 anterolisthesis of L3 on L4 with left paracentric disc protrusion and cranial migration of left paracentric disc extrusion with resultant partial effacement of the left lateral recess, moderate left neural foraminal narrowing, and mild right neuroforaminal narrowing. No significant spinal canal or neural foraminal stenosis is seen in the remainder of the lumbar spine.2.Findings of possible pars fractures at L3, which can be better evaluated on CT.