A 52-year-old man presents with progressive myelopathy characterized by lower limb weakness, hyperreflexia, and a positive Lhermitte's sign. MRI cervical spine shows multilevel spondylotic changes with severe stenosis at C4–C5 and C5–C6 levels. The spinal cord appears T2-hyperintense at C5. Which of the following best explains the T2-hyperintensity and predicts the POOREST prognosis for surgical recovery?
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