Question 1783
{"accessible":true,"alternatives":[{"id":8854,"text":"contrast staining"},{"id":8855,"text":"fogging phenomenon"},{"id":8856,"text":"hyperperfusion syndrome"},{"id":8857,"text":"luxury perfusion"},{"id":8858,"text":"subacute infarction"}],"archived":false,"correctAlternativeId":8856,"explanation":"\u003cp\u003e\u003ca href=\"/articles/cerebral-hyperperfusion-syndrome\" title=\"Cerebral hyperperfusion syndrome\"\u003eCerebral hyperperfusion syndrome\u003c/a\u003e\u0026nbsp;is a rare complication seen after treatment of long-standing severe carotid stenosis by\u0026nbsp;\u003ca href=\"https://radiopaedia.org/articles/carotid-endarterectomy?lang=gb\"\u003ecarotid endarterectomy\u003c/a\u003e\u0026nbsp;or\u0026nbsp;\u003ca href=\"https://radiopaedia.org/articles/carotid-arterial-stenting?lang=gb\"\u003ecarotid artery stenting\u003c/a\u003e. It is believed to be the result of a failure of normal cerebral blood flow autoregulation.\u0026nbsp;\u003c/p\u003e\u003cp\u003e\u003ca href=\"/articles/fogging-phenomenon-cerebral-infarct\" title=\"Fogging phenomenon (cerebral infarct)\"\u003eFogging phenomenon\u003c/a\u003e occurs 2-3 weeks following an infarct and represents a near-normal appearance of the\u0026nbsp;subacute infarct.\u003c/p\u003e\u003cp\u003e\u003ca href=\"/articles/luxury-perfusion\" title=\"Luxury perfusion\"\u003eLuxury perfusion\u003c/a\u003e is also seen in established infarcts on MRI and CT perfusion. Confusingly it is sometimes referred to as hyperperfusion.\u0026nbsp;\u003c/p\u003e\u003cp\u003e\u003c/p\u003e","id":1783,"imageUrl":"https://prod-images-static.radiopaedia.org/multiple_choice_questions/276/3_big_gallery.jpeg","imageAttribution":{"kind":"case","rID":12456},"imageAttributionCaseInfo":{"title":"Cerebral hyperperfusion syndrome","contributor_name":"Frank Gaillard","contributor_param":"frank","case_rid":12456,"case_param":"cerebral-hyperperfusion-syndrome"},"firstQuestionPath":"/questions/1790","nextQuestionPath":"/articles/fogging-phenomenon-cerebral-infarct/questions/1776","relatedArticles":[{"id":31763,"title":"Carotid artery stenosis","link":"/articles/carotid-artery-stenosis?lang=us"},{"id":57188,"title":"Luxury perfusion","link":"/articles/luxury-perfusion?lang=us"},{"id":36641,"title":"Carotid endarterectomy","link":"/articles/carotid-endarterectomy?lang=us"},{"id":13315,"title":"Carotid arterial stenting","link":"/articles/carotid-arterial-stenting?lang=us"},{"id":48821,"title":"Cerebral hyperperfusion syndrome","link":"/articles/cerebral-hyperperfusion-syndrome?lang=us"}],"alsoUsedIn":[{"id":784,"kind":"Course","title":"Stroke Learning Pathway - page 784","link":"https://radiopaedia.org/courses/stroke-learning-pathway/pages/784"},{"id":1181,"kind":"Course","title":"Adult Neuroradiology Review Course - page 1181","link":"https://radiopaedia.org/courses/adult-neuroradiology-review-course/pages/1181"},{"id":1181,"kind":"Course","title":"Adult Neuroradiology Review Course - page 1181","link":"https://radiopaedia.org/courses/adult-brain-mri-review-course-2015-online-video/pages/1181"},{"id":2121,"kind":"Course","title":"Stroke Learning Pathway - peer review - page 2121","link":"https://radiopaedia.org/courses/stroke-learning-pathway-peer-review/pages/2121"}],"stem":"\u003cp\u003eThis elderly man develops weakness 6-hours\u0026nbsp;after carotid endarterectomy. A non-contrast CT is obtained (shown below).\u0026nbsp;\u003c/p\u003e\u003cp\u003eWhat is the most likely diagnosis?\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/1783"}],"attemptsPercentages":[{"alternativeId":"8856","percentage":67},{"alternativeId":"8858","percentage":11},{"alternativeId":"8854","percentage":3},{"alternativeId":"8857","percentage":9},{"alternativeId":"8855","percentage":10}],"promptToLogin":false,"questionManager":false,"articleId":"fogging-phenomenon-cerebral-infarct"}