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On the axial T1-weighted MR image, congenital lumbar stenosis is exaggerated by the presence of ossification of the yellow ligament (hypointense) resulting in marked bilateral, dorsolateral thecal sac compression. Additionally, fluid is seen in both facet joints, indicating the presence of moderate degenerative changes and instability, accompanied by a broad-based right-sided hyperintense synovial cyst that fills the dorsal aspect of the spinal canal
