Question 3016
{"accessible":false,"alternatives":[{"id":14658,"text":"double line sign"},{"id":14659,"text":"lightbulb sign"},{"id":14657,"text":"penumbra sign "},{"id":14656,"text":"rim sign "}],"archived":false,"correctAlternativeId":14657,"explanation":"\u003cp\u003eThe rim of high T1 signal surrounding an abscess cavity is known as the penumbra sign, and it is especially useful and may increase diagnostic confidence in either soft tissue or bone abscess particularly when intravenous contrast is not administered.\u0026nbsp;\u003c/p\u003e\u003cp\u003eMcGuinness B et al. The “penumbra sign” on T1-weighted MRI for differentiating musculoskeletal infection from tumor. Skeletal Radiology. 2007 36:417-421.\u0026nbsp;\u003c/p\u003e","id":3016,"imageUrl":null,"imageAttribution":null,"imageAttributionCaseInfo":null,"firstQuestionPath":"/questions/3016","nextQuestionPath":null,"relatedArticles":[{"id":1236,"title":"Double line sign","link":"/articles/double-line-sign?lang=us"},{"id":98301,"title":"Intraosseous abscess","link":"/articles/intraosseous-abscess?lang=us"},{"id":1987,"title":"Rim sign (osteonecrosis)","link":"/articles/rim-sign-osteonecrosis?lang=us"}],"alsoUsedIn":[{"id":2191,"kind":"Course","title":"Radiopaedia 2024 - Virtual Conference - page 2191","link":"https://radiopaedia.org/courses/radiopaedia-2024-virtual-conference/pages/2191"},{"id":2191,"kind":"Course","title":"2024 Virtual Conference Private Use - page 2191","link":"https://radiopaedia.org/courses/2024-virtual-conference-private-use/pages/2191"},{"id":2528,"kind":"Course","title":"2024 Virtual Conference Private Use - page 2528","link":"https://radiopaedia.org/courses/2024-virtual-conference-private-use/pages/2528"},{"id":2528,"kind":"Course","title":"Radiopaedia 2024 - Virtual Conference - page 2528","link":"https://radiopaedia.org/courses/radiopaedia-2024-virtual-conference/pages/2528"},{"id":2014,"kind":"Course","title":"2024 Virtual Conference Private Use - page 2014","link":"https://radiopaedia.org/courses/2024-virtual-conference-private-use/pages/2014"},{"id":406,"kind":"LiveSchedule","title":"406","link":"https://radiopaedia.org/admin/live_schedules/406"},{"id":396,"kind":"LiveSchedule","title":"396","link":"https://radiopaedia.org/admin/live_schedules/396"}],"stem":"\u003cp\u003eWhat is the term used to describe the peripheral rim of relative T1 hyperintense signal seen in bone and soft tissue abscesses?\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/3016"}],"attemptsPercentages":[{"alternativeId":"14657","percentage":79},{"alternativeId":"14656","percentage":12},{"alternativeId":"14659","percentage":3},{"alternativeId":"14658","percentage":7}],"promptToLogin":false,"questionManager":false,"articleId":"penumbra-sign-intraosseous-abscess"}