Question 1358
{"accessible":true,"alternatives":[{"id":6771,"text":"A"},{"id":6772,"text":"B"},{"id":6773,"text":"C"},{"id":6774,"text":"D"}],"archived":false,"correctAlternativeId":6771,"explanation":"\u003cp\u003eThe combination of ventriculomegaly, Sylvian fissure widening, and crowding at the vertex has been termed disproportionately enlarged subarachnoid space hydrocephalus (DESH), reflecting disproportionality between the superior and inferior CSF spaces and is characteristic of normal pressure hydrocephalus. Note also how the callosal angle (which should be measured more posteriorly at the level of the posterior commissure) appears narrowed.\u0026nbsp;\u003c/p\u003e","id":1358,"imageUrl":"https://prod-images-static.radiopaedia.org/multiple_choice_questions/52/FG_MCQ_my_copy__SQUARE_.001_big_gallery.jpeg","imageAttribution":{"kind":"external","attribution":"Case A: Normal pressure hydrocephalus (rID: 71059) contributed by Frank Gaillard. Case B: Alzheimer disease (rID: 22196) contributed by Frank Gaillard. Case C: Fronto-temporal lobar degeneration - semantic variant (rID: 22290) contributed by Brad Hayhow. Case D: Normal MRI brain (rID: 39310) contributed by Bruno Di Muzio."},"imageAttributionCaseInfo":null,"firstQuestionPath":"/questions/1361","nextQuestionPath":"/articles/alzheimer-disease-1/questions/1357","relatedArticles":[{"id":6306,"title":"Normal pressure hydrocephalus","link":"/articles/normal-pressure-hydrocephalus?lang=us"},{"id":13001,"title":"Neurodegenerative disease","link":"/articles/neurodegenerative-disease?lang=us"},{"id":28361,"title":"Neurodegenerative MRI brain (an approach)","link":"/articles/neurodegenerative-mri-brain-an-approach?lang=us"},{"id":3969,"title":"Frontotemporal lobar degeneration","link":"/articles/frontotemporal-lobar-degeneration-1?lang=us"}],"alsoUsedIn":[{"id":1171,"kind":"Course","title":"Adult Neuroradiology Review Course - page 1171","link":"https://radiopaedia.org/courses/adult-neuroradiology-review-course/pages/1171"},{"id":1171,"kind":"Course","title":"Adult Neuroradiology Review Course - page 1171","link":"https://radiopaedia.org/courses/adult-brain-mri-review-course-2015-online-video/pages/1171"}],"stem":"\u003cp\u003eWhich of the following images most likely represents a patient with normal pressure hydrocephalus?\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/1358"}],"attemptsPercentages":[{"alternativeId":"6774","percentage":3},{"alternativeId":"6771","percentage":85},{"alternativeId":"6772","percentage":7},{"alternativeId":"6773","percentage":6}],"promptToLogin":false,"questionManager":false,"articleId":"alzheimer-disease"}