Question 1443
{"accessible":false,"alternatives":[{"id":7198,"text":"diaphragma sellae"},{"id":7199,"text":"dorsum sellae"},{"id":7200,"text":"olfactory groove"},{"id":7201,"text":"planum sphenoidale"},{"id":7202,"text":"tuberculum sellae"}],"archived":false,"correctAlternativeId":7202,"explanation":"\u003cp\u003eIn approximately 70% of cases, the \u003ca title=\"Optic chiasm\" class=\"internal\" href=\"/articles/optic-chiasm\"\u003eoptic chiasm\u003c/a\u003e is located above the \u003ca title=\"Diaphragma sellae\" class=\"internal\" href=\"/articles/diaphragma-sellae\"\u003ediaphragma sellae\u003c/a\u003e, and thus directly above the anterior pituitary gland.\u0026nbsp;\u003c/p\u003e\u003cp\u003eIn 15% of cases, it is prefixed and located above the \u003ca title=\"Tuberculum sellae\" class=\"internal\" href=\"/articles/tuberculum-sellae\"\u003etuberculum sellae\u003c/a\u003e.\u0026nbsp;\u003c/p\u003e\u003cp\u003eIn 15% of cases, it is postfixed and located above the \u003ca title=\"Dorsum sellae\" class=\"internal\" href=\"/articles/dorsum-sellae\"\u003edorsum\u0026nbsp;sellae\u003c/a\u003e.\u0026nbsp;\u003c/p\u003e","id":1443,"imageUrl":null,"imageAttribution":null,"imageAttributionCaseInfo":null,"firstQuestionPath":"/questions/1444","nextQuestionPath":"/articles/optic-chiasm/questions/1442","relatedArticles":[{"id":48300,"title":"Dorsum sellae","link":"/articles/dorsum-sellae?lang=us"},{"id":1888,"title":"Pituitary gland","link":"/articles/pituitary-gland?lang=us"},{"id":52072,"title":"Tuberculum sellae","link":"/articles/tuberculum-sellae?lang=us"}],"alsoUsedIn":[],"stem":"\u003cp\u003eA prefixed optic chiasm is located directly above the...\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/1443"}],"attemptsPercentages":[{"alternativeId":"7202","percentage":55},{"alternativeId":"7200","percentage":6},{"alternativeId":"7201","percentage":4},{"alternativeId":"7198","percentage":16},{"alternativeId":"7199","percentage":19}],"promptToLogin":false,"questionManager":false,"articleId":"optic-chiasm"}