Question 1172
{"accessible":false,"alternatives":[{"id":5866,"text":"appears as a cortically-based lucent lesion with thin sclerotic margin (unless healed)"},{"id":5867,"text":"fibroxanthoma is an outdated term for the same pathology and should be avoided"},{"id":5868,"text":"if less than 30 mm, the term fibrous cortical defect is often used"},{"id":5869,"text":"most common at the diaphysis but may occur at the metaphysis"},{"id":5870,"text":"peak age is 10 to 15 years but there is wide variation"}],"archived":false,"correctAlternativeId":5869,"explanation":"\u003cp\u003eThe majority of non-ossifying fibromas (more than 90%) occur at the metaphysis. All other answer statements are correct.\u0026nbsp;\u0026nbsp;\u003c/p\u003e","id":1172,"imageUrl":null,"imageAttribution":null,"imageAttributionCaseInfo":null,"firstQuestionPath":"/questions/1747","nextQuestionPath":"/articles/non-ossifying-fibroma-1/questions/1154","relatedArticles":[{"id":1339,"title":"Fibroxanthoma of bone","link":"/articles/fibroxanthoma-of-bone?lang=us"},{"id":7472,"title":"Fibrous cortical defect (historical)","link":"/articles/fibrous-cortical-defect-historical?lang=us"}],"alsoUsedIn":[{"id":145,"kind":"Course","title":"Paediatric MSK: \"leave me alone\" lesions","link":"https://radiopaedia.org/courses/paediatric-msk-leave-me-alone-lesions"},{"id":1198,"kind":"Course","title":"Paediatric Lectures - page 1198","link":"https://radiopaedia.org/courses/paediatric-lectures/pages/1198"}],"stem":"\u003cp\u003eWhich is \u003cstrong\u003eNOT\u003c/strong\u003e true of non-ossifying fibroma?\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/1172"}],"attemptsPercentages":[{"alternativeId":"5869","percentage":32},{"alternativeId":"5870","percentage":5},{"alternativeId":"5868","percentage":26},{"alternativeId":"5867","percentage":35},{"alternativeId":"5866","percentage":2}],"promptToLogin":false,"questionManager":false,"articleId":"non-ossifying-fibroma"}