Question 88
{"accessible":false,"alternatives":[{"id":450,"text":"neurofibromatosis type 1"},{"id":451,"text":"neurofibromatosis type 2"},{"id":452,"text":"Sturge Weber syndrome"},{"id":453,"text":"tuberous sclerosis"},{"id":454,"text":"von Hippel Lindau disease"}],"archived":false,"correctAlternativeId":450,"explanation":"\u003cp\u003eThere is a strong association with\u0026nbsp;neurofibromatosis type 1 (NF1). NF1 associated tumors have a tendency to affect the\u0026nbsp;optic nerves\u0026nbsp;and chiasm and may also have a better prognosis. Pilocytic astrocytomas are seen in up to 20% of all patients with NF1 and typically manifest in early childhood. Approximately one-third of pilocytic astrocytomas involving the optic nerves have associated NF1.\u003c/p\u003e","id":88,"imageUrl":null,"imageAttribution":null,"imageAttributionCaseInfo":null,"firstQuestionPath":"/questions/2249","nextQuestionPath":"/articles/pilocytic-astrocytoma/questions/86","relatedArticles":[],"alsoUsedIn":[],"stem":"\u003cp\u003eWith which phakomatosis are pilocytic astrocytomas most strongly associated?\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/88"}],"attemptsPercentages":[{"alternativeId":"453","percentage":9},{"alternativeId":"450","percentage":75},{"alternativeId":"454","percentage":4},{"alternativeId":"451","percentage":7},{"alternativeId":"452","percentage":5}],"promptToLogin":false,"questionManager":false,"articleId":"pilocytic-astrocytoma"}