Question 412
{"accessible":false,"alternatives":[{"id":2062,"text":"direct extension"},{"id":2063,"text":"immunosuppression"},{"id":2064,"text":"migratory vasculitis"},{"id":2065,"text":"seeding from bacteremia"},{"id":2066,"text":"spread from thrombophlebitis"}],"archived":false,"correctAlternativeId":2066,"explanation":"\u003cp\u003eIn the most common scenario, patients develop subdural empyemas as a result of frontal\u0026nbsp;\u003ca href=\"https://radiopaedia.org/articles/acute-sinusitis\"\u003esinusitis\u003c/a\u003e. There are two putative mechanisms of spread:\u003c/p\u003e\u003col\u003e\n\u003cli\u003edirect extension\u003c/li\u003e\n\u003cli\u003eindirect: secondary to thrombophlebitis\u003c/li\u003e\n\u003c/ol\u003e\u003cp\u003eDirect spread, resulting from erosion of the posterior wall of the frontal sinus (\u003ca href=\"/articles/pott-puffy-tumour\"\u003ePott\u0026nbsp;puffy tumor\u003c/a\u003e) is relatively uncommon. \u003cstrong\u003eThrombophlebitis\u003c/strong\u003e of communicating veins is thought to be the most common cause of spread.\u003c/p\u003e","id":412,"imageUrl":null,"imageAttribution":null,"imageAttributionCaseInfo":null,"firstQuestionPath":"/questions/1540","nextQuestionPath":"/articles/subdural-empyema/questions/410","relatedArticles":[],"alsoUsedIn":[],"stem":"\u003cp\u003eThe typical mechanism of spread causing subdural empyema is...\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/412"}],"attemptsPercentages":[{"alternativeId":"2065","percentage":10},{"alternativeId":"2063","percentage":3},{"alternativeId":"2066","percentage":37},{"alternativeId":"2062","percentage":47},{"alternativeId":"2064","percentage":3}],"promptToLogin":false,"questionManager":false,"articleId":"subdural-empyema"}