Question 692
{"accessible":true,"alternatives":[{"id":3479,"text":"A"},{"id":3480,"text":"B"},{"id":3481,"text":"C"},{"id":3482,"text":"D"},{"id":3483,"text":"E"},{"id":3484,"text":"F"}],"archived":false,"correctAlternativeId":3479,"explanation":"\u003cp\u003e\u003ca href=\"/articles/open-ring-sign\" title=\"Open ring enhancement\"\u003eOpen ring enhancement\u003c/a\u003e is a characteristic and quite specific feature of demyelination, in this case \u003ca href=\"/articles/acute-disseminated-encephalomyelitis-adem-1\" title=\"Acute disseminated encephalomyelitis (ADEM)\"\u003eADEM\u003c/a\u003e.\u0026nbsp;\u003c/p\u003e\u003cp\u003e\u003c/p\u003e","id":692,"imageUrl":"https://prod-images-static.radiopaedia.org/multiple_choice_questions/912/d8098866119d81f9e87d2f27b286f9_big_gallery_big_gallery.jpeg","imageAttribution":{"kind":"external","attribution":"A) Frank Gaillard rID: 2576; B) Rajalakshmi Ramesh rID: 34277; C) Vinay Shah rID: 20059; D) Frank Gaillard rID: 33041; E) Frank Gaillard rID: 4729; F) Ahmed Abd Rabou rID: 25954"},"imageAttributionCaseInfo":null,"firstQuestionPath":"/questions/2511","nextQuestionPath":null,"relatedArticles":[{"id":1207,"title":"Demyelination","link":"/articles/demyelination?lang=us"},{"id":27100,"title":"Tumefactive multiple sclerosis","link":"/articles/tumefactive-multiple-sclerosis?lang=us"},{"id":2225,"title":"Tumefactive demyelinating lesion","link":"/articles/tumefactive-demyelinating-lesion?lang=us"}],"alsoUsedIn":[{"id":1168,"kind":"Course","title":"Adult Neuroradiology Review Course - page 1168","link":"https://radiopaedia.org/courses/adult-neuroradiology-review-course/pages/1168"},{"id":1168,"kind":"Course","title":"Adult Neuroradiology Review Course - page 1168","link":"https://radiopaedia.org/courses/adult-brain-mri-review-course-2015-online-video/pages/1168"}],"stem":"\u003cp\u003eWhich of the following six images is most likely a case of demyelination?\u0026nbsp;\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/692"}],"attemptsPercentages":[{"alternativeId":"3483","percentage":1},{"alternativeId":"3481","percentage":7},{"alternativeId":"3479","percentage":77},{"alternativeId":"3482","percentage":7},{"alternativeId":"3484","percentage":3},{"alternativeId":"3480","percentage":5}],"promptToLogin":false,"questionManager":false,"articleId":"acute-disseminated-encephalomyelitis-adem"}