Question 906
{"accessible":false,"alternatives":[{"id":4555,"text":"anterior corticospinal tract"},{"id":4556,"text":"dorsal columns"},{"id":4557,"text":"lateral corticospinal tract"},{"id":4558,"text":"spinocerebellar tracts"},{"id":4559,"text":"spinothalamic tracts"}],"archived":false,"correctAlternativeId":4556,"explanation":"\u003cp\u003e\u003ca href=\"/articles/subacute-combined-degeneration-of-the-cord-1\"\u003eSubacute combined degeneration of the cord\u003c/a\u003e\u003cstrong\u003e\u0026nbsp;\u003c/strong\u003eis caused by a\u0026nbsp;\u003ca href=\"https://radiopaedia.org/articles/vitamin-b12\"\u003evitamin B12\u003c/a\u003e\u0026nbsp;deficiency and most commonly affects the \u003ca href=\"/articles/dorsal-columns\"\u003edorsal columns\u003c/a\u003e, although can uncommonly then affect the lateral tracts (e.g. \u003ca href=\"/articles/lateral-corticospinal-tract\"\u003elateral corticospinal tract\u003c/a\u003e, \u003ca href=\"/articles/lateral-spinothalamic-tract\"\u003elateral spinothalamic tract\u003c/a\u003e, \u003ca href=\"/articles/spinocerebellar-tract\"\u003espinocerebellar tracts\u003c/a\u003e) and rarely, the anterior spinal cord (e.g. \u003ca href=\"/articles/anterior-corticospinal-tract\"\u003eanterior corticospinal tract\u003c/a\u003e, \u003ca href=\"/articles/anterior-spinothalamic-tract-1\"\u003eanterior spinothalamic tract\u003c/a\u003e). Involvement of the \u003ca href=\"/articles/dorsal-columns\"\u003edorsal columns\u003c/a\u003e, as is most common, manifests clinically as issues with proprioception and vibration senses.\u003c/p\u003e\u003cp\u003eMRI most commonly demonstrates symmetric bilateral high T2-weighted signal within the \u003ca href=\"/articles/dorsal-columns\"\u003edorsal columns\u003c/a\u003e of the thoracic cord, giving a classic 'inverted V sign' appearance. This signal can extend laterally or anteriorly to other \u003ca title=\"White matter tracts of the spinal cord\" class=\"internal\" href=\"/articles/white-matter-tracts-of-the-spinal-cord\"\u003ewhite matter tracts\u003c/a\u003e as the disease progresses.\u003c/p\u003e","id":906,"imageUrl":null,"imageAttribution":null,"imageAttributionCaseInfo":null,"firstQuestionPath":"/questions/906","nextQuestionPath":null,"relatedArticles":[{"id":6809,"title":"Cuneate fasciculus","link":"/articles/cuneate-fasciculus-1?lang=us"},{"id":55607,"title":"Dorsal columns","link":"/articles/dorsal-columns?lang=us"},{"id":55608,"title":"Gracile fasciculus","link":"/articles/gracile-fasciculus-1?lang=us"},{"id":53264,"title":"Corticospinal tract","link":"/articles/corticospinal-tract?lang=us"},{"id":47408,"title":"Anterior corticospinal tract","link":"/articles/anterior-corticospinal-tract?lang=us"},{"id":47482,"title":"Lateral corticospinal tract","link":"/articles/lateral-corticospinal-tract?lang=us"},{"id":47499,"title":"Spinocerebellar tract","link":"/articles/spinocerebellar-tract?lang=us"},{"id":30559,"title":"Nitrous oxide toxicity","link":"/articles/nitrous-oxide-toxicity?lang=us"},{"id":49209,"title":"Spinothalamic tracts","link":"/articles/spinothalamic-tracts?lang=us"},{"id":2116,"title":"Subacute combined degeneration of the cord","link":"/articles/subacute-combined-degeneration-of-the-cord-1?lang=us"},{"id":49153,"title":"Lateral spinothalamic tract","link":"/articles/lateral-spinothalamic-tract?lang=us"},{"id":56011,"title":"White matter tracts of the spinal cord","link":"/articles/white-matter-tracts-of-the-spinal-cord?lang=us"}],"alsoUsedIn":[{"id":461,"kind":"Course","title":"Radiology Review Course - Melbourne - page 461","link":"https://radiopaedia.org/courses/radiology-review-course-melbourne-2019/pages/461"},{"id":461,"kind":"Course","title":"Radiology Review Course - page 461","link":"https://radiopaedia.org/courses/radiology-review-course-online/pages/461"},{"id":507,"kind":"Course","title":"Neurodegenerative Learning Pathway - page 507","link":"https://radiopaedia.org/courses/neurodegenerative-learning-pathway/pages/507"}],"stem":"\u003cp\u003eWhich\u0026nbsp;tract(s) of the spinal cord are most commonly involved in subacute combined degeneration of the cord due to vitamin B12 deficiency?\u003c/p\u003e","menuLinks":[{"text":"Report problem with question","url":"https://docs.google.com/forms/d/e/1FAIpQLSfO3soWYhOjJ7yErSysyCe5V4A1CqW7WK3rDA7MtAkecMGqNw/viewform?entry.1624461248\u0026entry.553583435=https://radiopaedia.org/questions/906"}],"attemptsPercentages":[{"alternativeId":"4559","percentage":3},{"alternativeId":"4557","percentage":3},{"alternativeId":"4556","percentage":88},{"alternativeId":"4558","percentage":2},{"alternativeId":"4555","percentage":4}],"promptToLogin":false,"questionManager":false,"articleId":"anterior-spinothalamic-tract"}