Question 2234
{"accessible":false,"alternatives":[{"id":11063,"text":"aneurysmal bone cyst"},{"id":11064,"text":"chondroblastoma"},{"id":11065,"text":"enchondroma"},{"id":11066,"text":"giant cell tumor of bone"},{"id":11067,"text":"simple bone cyst"}],"archived":false,"correctAlternativeId":11067,"explanation":"\u003cp\u003eThe \u003ca href=\"/articles/fallen-fragment-sign\"\u003efallen fragment sign\u003c/a\u003e is seen in simple bone cyst (unicameral bone cyst) with a pathological fracture. Part of the thinned cortex 'falls' into the cyst, confirming that the lucency is both fluid-filled and uni-loculated. Solid or multilocular bone lesions (which all the other answer options are) would not allow a fragment to fall and therefore will not demonstrate this sign.\u0026nbsp;\u003c/p\u003e","id":2234,"imageUrl":null,"imageAttribution":null,"imageAttributionCaseInfo":null,"firstQuestionPath":"/questions/2234","nextQuestionPath":"/articles/giant-cell-tumour-of-bone/questions/2227","relatedArticles":[{"id":894,"title":"Aneurysmal bone cyst","link":"/articles/aneurysmal-bone-cyst?lang=us"},{"id":9259,"title":"Chondroblastoma","link":"/articles/chondroblastoma?lang=us"},{"id":7620,"title":"Enchondroma","link":"/articles/enchondroma?lang=us"},{"id":7189,"title":"Unicameral bone cyst","link":"/articles/unicameral-bone-cyst-1?lang=us"},{"id":12354,"title":"Fallen fragment sign","link":"/articles/fallen-fragment-sign?lang=us"}],"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\u003eThe 'fallen fragment sign' is seen in the setting of\u0026nbsp;pathological fracture through which bone lesion?\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/2234"}],"attemptsPercentages":[{"alternativeId":"11064","percentage":1},{"alternativeId":"11065","percentage":2},{"alternativeId":"11066","percentage":3},{"alternativeId":"11063","percentage":7},{"alternativeId":"11067","percentage":87}],"promptToLogin":false,"questionManager":false,"articleId":"giant-cell-tumor-of-bone"}