Presentation
Low back pain with right limb sensory change.
Patient Data
The L5-S1 level shows the "shiny corner sign" of the anterior endplates - focal high T1 signal and high T2 signal with fat suppression on the STIR sequence.
Mild disc and mild-to-moderate facet degeneration with ligamentum flavum thickening. Bilateral L4-5 posterior juxta facet cysts. Mild spinal canal stenoses at the L1-2 to L3-4 levels. Mild neural exit foraminal stenoses at the L2-3 and L3-4 levels.
Case Discussion
The shiny corner sign is a reactive sclerosis to endplate inflammation, which in this case has fat-intensity signal in keeping with post-inflammatory degeneration. This is in keeping with the patient's long-standing history of ankylosing spondylitis and Crohn disease on biological treatment. No cause for the patient's presentation was identified on this study.
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