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Background: Transection-induced axonal retrograde degeneration, in contrast to Wallerian degeneration, has not been widely recognized in clinical practice.

Aims Of The Study: To assess a potential of corticospinal tractography for detecting axonal retrograde degeneration.

Methods: We assessed the corticospinal tractography of a 74-year-old woman with monoplegia of the lower limb due to a unilateral thoracic spinal cord tumor.

Results: The tractography revealed integrity reduction of the corticospinal tract in the cerebra contralateral to the spinal cord tumor.

Conclusions: The present report supports that magnetic resonance tractography has the potential for detecting this under-recognized phenomenon.