Question 2219
{"accessible":true,"alternatives":[{"id":10989,"text":"haemarthrosis in the infrapatellar bursa"},{"id":10990,"text":"haemarthrosis in the suprapatellar bursa"},{"id":10991,"text":"lipohaemarthrosis in the infrapatellar bursa"},{"id":10992,"text":"lipohaemarthrosis in the suprapatellar bursa"}],"archived":false,"correctAlternativeId":10990,"explanation":"\u003cp\u003eThis image demonstrates a\u0026nbsp;\u003cstrong\u003esuprapatellar haemarthrosis\u003c/strong\u003e displacing the normal anterior fat pads, there is no fat-fluid level.\u003c/p\u003e\u003cp\u003eThe radiograph has been performed as a vertical beam lateral or 'rolled lateral' therefore no fat (if present in the effusion) can settle to form that fat-fluid level seen in horizontal beam lateral knee projections.\u0026nbsp;\u003c/p\u003e","id":2219,"imageUrl":"https://prod-images-static.radiopaedia.org/images/266097/620847c99537aa43abaa68b7ac480744a3433928ac80f6b1d64c47d4016bc579_big_gallery.jpeg","imageAttribution":{"kind":"case","rID":8503},"imageAttributionCaseInfo":{"title":"Patellar fracture - comminuted","contributor_name":"Gagandeep Singh","contributor_param":"drgags","case_rid":8503,"case_param":"patellar-fracture-comminuted-5"},"firstQuestionPath":"/questions/2219","nextQuestionPath":"/articles/knee-horizontal-beam-lateral-view-1/questions/2218","relatedArticles":[{"id":24926,"title":"Haemarthrosis","link":"/articles/haemarthrosis?lang=gb"},{"id":1358,"title":"Lipohaemarthrosis","link":"/articles/lipohaemarthrosis?lang=gb"},{"id":10594,"title":"Joint effusion","link":"/articles/joint-effusion?lang=gb"}],"alsoUsedIn":[{"id":1038,"kind":"RestrictedPage","title":"Page 1038 (in no courses)","link":"https://radiopaedia.org/admin/restricted_pages/1038"},{"id":2044,"kind":"Course","title":"X-ray Interpretation: Knee Injuries peer review - page 2044","link":"https://radiopaedia.org/courses/x-ray-interpretation-knee-injuries-peer-review/pages/2044"},{"id":2044,"kind":"Course","title":"X-ray Interpretation: Knee Injuries - page 2044","link":"https://radiopaedia.org/courses/x-ray-interpretation-knee-injuries/pages/2044"}],"stem":"\u003cp\u003eThis lateral knee projection of a comminuted patellar fracture performed with a vertical beam demonstrates...\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/2219"}],"attemptsPercentages":[{"alternativeId":"10989","percentage":4},{"alternativeId":"10990","percentage":84},{"alternativeId":"10991","percentage":5},{"alternativeId":"10992","percentage":7}],"promptToLogin":false,"questionManager":false,"articleId":"knee-horizontal-beam-lateral-view"}