Regarding “Circulatory dynamics of the cauda equina in lumbar canal stenosis using dynamic contrast-enhanced magnetic resonance imaging”

I read with interest the article by Kobayashi et al. in The Spine Journal October issue [1]. The occurrence of enhancement at the site of lumbar canal stenosis is an important one, and infrequently encountered in routine imaging of the lumbar spine, because contrast material is generally not given. When it does occur, it can be a source of confusion to the clinician and radiologist, who might ascribe a more ominous diagnosis of enhancing tumor or infection. The authors are to be commended for studying this topic.

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