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. 2017 Jul 9;9(7):e1449. doi: 10.7759/cureus.1449

Figure 2. Interspinous fluid with L4-5 one level stenosis on T2 sagittal magnetic resonance imaging (MRI) studies.

Figure 2

A: L5-S1 large interspinous hyperintense fluid (two solid white arrows) with no ligamentous enlargement. L4-5 minimal ligamentous enlargement posteriorly (dashed white arrow) with early canal stenosis. L4-5 intervertebral disc has early signs of T2 signal desiccation.

B: Narrowed and dessicated intervertebral disc at L4-5 with annular bulge (dashed black arrow) with minimal dorsal posterior spinal cyst (dashed white arrow) causing posterior central canal stenosis connected to interspinous fluid (solid white arrows).

C: Grade 1 spondylolisthesis at L4-5 (dashed black arrow), posterior fibrous ligamentum flavum hypertrophy (dashed white arrow) and fluid in interspinous space (solid white arrows).

D: Degenerated narrowed L4-5 intervertebral disc with annular bulge and grade 1 spondylolisthesis (superior dashed black arrow). Grade 2 spondylolisthesis at L5-S1 with marked endplate degeneration (inferior dashed black arrow). Posterior interspinous cyst (solid red arrow) with marked ligamentous hypertrophy and stenosis at L4-5 (two dashed white arrows). Marked edema and displacement of cauda equina roots.