Question 1156
{"accessible":false,"alternatives":[{"id":5787,"text":"fluid-fluid levels on MRI are considered pathognomic "},{"id":5788,"text":"more common within the vertebral body than the posterior elements"},{"id":5789,"text":"most common in middle-aged adults"},{"id":5790,"text":"typically diaphyseal in location"},{"id":5791,"text":"up to one third are secondary to an underlying lesion"}],"archived":false,"correctAlternativeId":5791,"explanation":"\u003cp\u003eUp to a third\u0026nbsp;of aneurysmal bone cysts are secondary to an underlying lesion such as\u0026nbsp;chondroblastoma,\u0026nbsp;fibrous dysplasia,\u0026nbsp;osteosarcoma,\u0026nbsp;giant cell tumor,\u0026nbsp;chondromyxoid fibroma and\u0026nbsp;non-ossifying fibroma.\u0026nbsp;\u003c/p\u003e\u003cp\u003eWhile fluid-fluid levels on MRI are characteristic of ABC, they are not pathognomic and may be seen in other lesions including giant cell tumors and\u0026nbsp;telangiectatic osteosarcomas. ABCs have a predilection for the posterior vertebral elements over the vertebral body, they are most common in individuals below the age of 20, and are typically metaphyseal in location.\u0026nbsp;\u003c/p\u003e","id":1156,"imageUrl":null,"imageAttribution":null,"imageAttributionCaseInfo":null,"firstQuestionPath":"/questions/2234","nextQuestionPath":"/articles/aneurysmal-bone-cyst/questions/1155","relatedArticles":[],"alsoUsedIn":[{"id":1110,"kind":"RestrictedPage","title":"Page 1110 (in no courses)","link":"https://radiopaedia.org/admin/restricted_pages/1110"},{"id":2077,"kind":"Course","title":"X-ray Interpretation: Bone Lesions Peer Review - page 2077","link":"https://radiopaedia.org/courses/x-ray-interpretation-bone-lesions-peer-review/pages/2077"},{"id":2077,"kind":"Course","title":"X-ray Interpretation: Bone Lesions - page 2077","link":"https://radiopaedia.org/courses/x-ray-interpretation-bone-lesions/pages/2077"}],"stem":"\u003cp\u003eWhich is true regarding aneurysmal bone cysts?\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/1156"}],"attemptsPercentages":[{"alternativeId":"5787","percentage":46},{"alternativeId":"5789","percentage":2},{"alternativeId":"5788","percentage":3},{"alternativeId":"5790","percentage":5},{"alternativeId":"5791","percentage":44}],"promptToLogin":false,"questionManager":false,"articleId":"aneurysmal-bone-cyst"}