Question 2231
{"accessible":false,"alternatives":[{"id":11048,"text":"Codman triangle"},{"id":11049,"text":"hair on end"},{"id":11050,"text":"lamellated "},{"id":11051,"text":"solid"},{"id":11052,"text":"sunburst"}],"archived":false,"correctAlternativeId":11048,"explanation":"\u003cp\u003eThe Codman triangle pattern of interrupted periosteal reaction represents periosteal new bone-forming at the margin of a rapidly growing tumour. The\u0026nbsp;tumour grows so fast that periosteal new bone is not able to grow over the major portion of the tumour.\u0026nbsp;\u003c/p\u003e\u003cp\u003eHair on end and sunburst periosteal reactions are also aggressive forms of spiculated interrupted periosteal reaction associated with moderately fast tumour growth.\u0026nbsp;\u003c/p\u003e\u003cp\u003eLamellated multi-layered periosteal reaction is still a sign of an aggressive lesion but is associated with intermittent growth or less rapid tumour growth.\u003c/p\u003e\u003cp\u003eSolid/smooth\u0026nbsp;periosteal reaction is a benign non-aggressive form of periosteal reaction which is due to reactive healing such as from a prior fracture, infection or osteoid osteoma.\u0026nbsp;\u003c/p\u003e","id":2231,"imageUrl":null,"imageAttribution":null,"imageAttributionCaseInfo":null,"firstQuestionPath":"/questions/2231","nextQuestionPath":"/articles/codman-triangle-periosteal-reaction/questions/1115","relatedArticles":[{"id":1860,"title":"Periosteal reaction","link":"/articles/periosteal-reaction?lang=gb"},{"id":1697,"title":"Multilayered periosteal reaction","link":"/articles/multilayered-periosteal-reaction?lang=gb"},{"id":2062,"title":"Solid periosteal reaction","link":"/articles/solid-periosteal-reaction?lang=gb"},{"id":2067,"title":"Spiculated periosteal reaction","link":"/articles/spiculated-periosteal-reaction?lang=gb"}],"alsoUsedIn":[{"id":1094,"kind":"Course","title":"[TRIAL] X-ray Interpretation: Bone Lesions - page 1094","link":"https://radiopaedia.org/courses/trial-x-ray-interpretation-bone-lesions/pages/1094"},{"id":2061,"kind":"Course","title":"X-ray Interpretation: Bone Lesions - page 2061","link":"https://radiopaedia.org/courses/x-ray-interpretation-bone-lesions/pages/2061"},{"id":2061,"kind":"Course","title":"X-ray Interpretation: Bone Lesions Peer Review - page 2061","link":"https://radiopaedia.org/courses/x-ray-interpretation-bone-lesions-peer-review/pages/2061"}],"stem":"\u003cp\u003eWhich of the following periosteal reaction types is said to be associated with the\u0026nbsp;fastest rate of bone tumour growth?\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/2231"}],"attemptsPercentages":[{"alternativeId":"11051","percentage":1},{"alternativeId":"11049","percentage":2},{"alternativeId":"11052","percentage":10},{"alternativeId":"11048","percentage":86},{"alternativeId":"11050","percentage":1}],"promptToLogin":false,"questionManager":false,"articleId":"codman-triangle-periosteal-reaction"}