Question 2151
{"accessible":true,"alternatives":[{"id":10683,"text":"the paramedian clear space"},{"id":10684,"text":"the precarinal clear space"},{"id":10685,"text":"the prevascular clear space"},{"id":10686,"text":"the retrosternal clear space"},{"id":10687,"text":"the subcostal clear space"}],"archived":false,"correctAlternativeId":10686,"explanation":"\u003cp\u003eThe retrosternal clear space or retrosternal airspace is seen posterior to the sternum on lateral chest radiographs, and should appear radiolucent. If there is increased soft tissue density posterior to the sternum, as in this case, it may signify the presence of an anterior mediastinal mass.\u0026nbsp;\u003c/p\u003e","id":2151,"imageUrl":"https://prod-images-static.radiopaedia.org/multiple_choice_questions/401/CXR_lat_big_gallery.jpeg","imageAttribution":{"kind":"external","attribution":"Sally Ayesa"},"imageAttributionCaseInfo":null,"firstQuestionPath":"/questions/2213","nextQuestionPath":"/articles/anterior-mediastinal-mass-1/questions/2089","relatedArticles":[{"id":18963,"title":"Retrosternal airspace","link":"/articles/retrosternal-airspace?lang=us"}],"alsoUsedIn":[{"id":993,"kind":"Course","title":"2021 Virtual Conference Private Use - page 993","link":"https://radiopaedia.org/courses/2021-virtual-conference-private-use/pages/993"},{"id":993,"kind":"Course","title":"2022 Virtual Conference Private Use - page 993","link":"https://radiopaedia.org/courses/2022-virtual-conference-private-use/pages/993"},{"id":970,"kind":"RestrictedPage","title":"Page 970 (in no courses)","link":"https://radiopaedia.org/admin/restricted_pages/970"},{"id":955,"kind":"RestrictedPage","title":"Page 955 (in no courses)","link":"https://radiopaedia.org/admin/restricted_pages/955"},{"id":1,"kind":"LiveSchedule","title":"1","link":"https://radiopaedia.org/admin/live_schedules/1"},{"id":55,"kind":"LiveSchedule","title":"55","link":"https://radiopaedia.org/admin/live_schedules/55"},{"id":942,"kind":"Course","title":"2021 Virtual Conference Private Use - page 942","link":"https://radiopaedia.org/courses/2021-virtual-conference-private-use/pages/942"},{"id":942,"kind":"Course","title":"X-ray \u0026 Ultrasound Lectures - page 942","link":"https://radiopaedia.org/courses/xray-lectures/pages/942"}],"stem":"\u003cp\u003eThis patient has a mass in the anterior mediastinum. What is the name of the space which is effaced on this radiograph which allows us to place the mass in the anterior mediastinum?\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/2151"}],"attemptsPercentages":[{"alternativeId":"10683","percentage":3},{"alternativeId":"10686","percentage":91},{"alternativeId":"10687","percentage":1},{"alternativeId":"10684","percentage":2},{"alternativeId":"10685","percentage":3}],"promptToLogin":false,"questionManager":false,"articleId":"anterior-mediastinal-mass"}