Question 97
{"accessible":false,"alternatives":[{"id":496,"text":"ethmoid"},{"id":497,"text":"maxilla"},{"id":498,"text":"sphenoid"},{"id":499,"text":"temporal"},{"id":500,"text":"zygomatic"}],"archived":false,"correctAlternativeId":499,"explanation":"\u003cp\u003eMacEwen triangle\u0026nbsp;(also called the\u0026nbsp;suprameatal triangle\u0026nbsp;or\u0026nbsp;mastoid fossa) is a small triangular depression affecting the inner table of the\u0026nbsp;temporal bone. It is of clinical importance for two reasons:\u003c/p\u003e\u003col\u003e\n\u003cli\u003ecortical bone is particularly thin in the triangle making a preferred route of\u0026nbsp;\u003ca href=\"https://radiopaedia.org/articles/subperiosteal-abscess-mastoid\"\u003esubperiosteal abscess (mastoid)\u003c/a\u003e\u0026nbsp;formation, secondary to\u0026nbsp;\u003ca href=\"https://radiopaedia.org/articles/coalescent-mastoiditis\"\u003ecoalescent mastoiditis\u003c/a\u003e.\u003c/li\u003e\n\u003cli\u003ethe\u0026nbsp;\u003ca href=\"https://radiopaedia.org/articles/missing?article%5Btitle%5D=mastoid-antrum\"\u003emastoid antrum\u003c/a\u003e\u0026nbsp;lies 1 cm deep to the triangle in the adult and is accessed when performing a cortical mastoidectomy.\u003c/li\u003e\n\u003c/ol\u003e","id":97,"imageUrl":null,"imageAttribution":null,"imageAttributionCaseInfo":null,"firstQuestionPath":"/questions/97","nextQuestionPath":null,"relatedArticles":[],"alsoUsedIn":[{"id":395,"kind":"RestrictedPage","title":"Page 395 (in no courses)","link":"https://radiopaedia.org/admin/restricted_pages/395"}],"stem":"\u003cp\u003eIn which skull bone is MacEwen’s triangle located?\u003c/p\u003e\u003cp\u003e\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/97"}],"attemptsPercentages":[{"alternativeId":"496","percentage":7},{"alternativeId":"498","percentage":17},{"alternativeId":"500","percentage":13},{"alternativeId":"497","percentage":9},{"alternativeId":"499","percentage":54}],"promptToLogin":false,"questionManager":false,"articleId":"macewen-triangle"}