Question 429
{"accessible":false,"alternatives":[{"id":2153,"text":"extraskeletal osteosarcomas make up 20% of cases"},{"id":2155,"text":"fluid-fluid levels are seen on MRI in 50% of telangiectatic subtypes"},{"id":2152,"text":"gnathic osteosarcoma occurs in an older age group"},{"id":2154,"text":"most commonly arises in the diaphysis"},{"id":2156,"text":"most commonly occurs around the hip"}],"archived":false,"correctAlternativeId":2152,"explanation":"\u003cp\u003eGnathic osteosarcomas (i.e. affecting the mandible) are said to occur in older groups (30s) than conventional osteosarcoma (10-20 years).\u0026nbsp;\u003c/p\u003e\u003cp\u003eExtraskeletal osteosarcomas make up only 5% of cases.\u0026nbsp;\u003c/p\u003e\u003cp\u003eOsteosarcomas most commonly arise at the metaphysis, and most commonly arise around the knee.\u0026nbsp;\u003c/p\u003e\u003cp\u003eFluid-fluid levels are seen on MRI in 90% of telangiectatic subtypes.\u003c/p\u003e","id":429,"imageUrl":null,"imageAttribution":null,"imageAttributionCaseInfo":null,"firstQuestionPath":"/questions/429","nextQuestionPath":null,"relatedArticles":[{"id":1170,"title":"Osteosarcoma","link":"/articles/osteosarcoma?lang=us"},{"id":10830,"title":"Telangiectatic osteosarcoma","link":"/articles/telangiectatic-osteosarcoma?lang=us"},{"id":7521,"title":"Fluid-fluid level containing bone lesions","link":"/articles/fluid-fluid-level-containing-bone-lesions-2?lang=us"}],"alsoUsedIn":[],"stem":"\u003cp\u003eIn regards to osteosarcoma, which of the following is true?\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/429"}],"attemptsPercentages":[{"alternativeId":"2152","percentage":39},{"alternativeId":"2156","percentage":4},{"alternativeId":"2155","percentage":32},{"alternativeId":"2153","percentage":12},{"alternativeId":"2154","percentage":13}],"promptToLogin":false,"questionManager":false,"articleId":"gnathic-osteosarcoma"}