Question 1947
{"accessible":false,"alternatives":[{"id":9685,"text":"advanced degenerative changes"},{"id":9686,"text":"flattening of femoral head, with depression graded into mild, moderate, and severe"},{"id":9687,"text":"cystic and sclerotic radiographic changes"},{"id":9688,"text":"joint space narrowing with or without acetabular involvement"},{"id":9689,"text":"normal radiograph, abnormal bone scan and/or MRI"},{"id":9690,"text":"subchondral lucency or crescent sign"}],"archived":false,"correctAlternativeId":9690,"explanation":"\u003cp\u003e\u003cstrong\u003eSteinberg staging\u0026nbsp;\u003c/strong\u003eof avascular necrosis of hip is a commonly used system, similar to the\u0026nbsp;\u003ca href=\"https://radiopaedia.org/articles/ficat-and-arlet-classification-of-avascular-necrosis-of-femoral-head?lang=gb\"\u003eFicat and Arlet staging\u003c/a\u003e.\u0026nbsp;It\u003cstrong\u003e\u0026nbsp;\u003c/strong\u003eis based on the radiographic appearance and location of lesion.\u003c/p\u003e\u003cp\u003eIn \u003cstrong\u003estage III\u003c/strong\u003e, there is a subchondral lucency or crescent sign.\u003c/p\u003e\u003cp\u003eQuantification of extent of involvement is necessary for stages I to V:\u003c/p\u003e\u003cul\u003e\u003cli\u003e\n\u003cstrong\u003estage III\u003c/strong\u003e\u003cul\u003e\n\u003cli\u003eA, mild: subchondral collapse (crescent) beneath \u0026lt;15% of articular surface\u003c/li\u003e\n\u003cli\u003eB, moderate: crescent beneath 15% to 30%\u003c/li\u003e\n\u003cli\u003eC, severe: crescent beneath \u0026gt;30%\u003c/li\u003e\n\u003c/ul\u003e\n\u003c/li\u003e\u003c/ul\u003e\u003cp\u003eFor more details please, refer to the article: \u003ca href=\"/articles/steinberg-staging-of-avascular-necrosis-1\"\u003eSteinberg staging of avascular necrosis\u003c/a\u003e.\u003c/p\u003e","id":1947,"imageUrl":null,"imageAttribution":null,"imageAttributionCaseInfo":null,"firstQuestionPath":"/questions/1947","nextQuestionPath":"/articles/ficat-and-arlet-classification-of-osteonecrosis-of-the-femoral-head/questions/1851","relatedArticles":[{"id":44537,"title":"Steinberg staging of osteonecrosis of the femoral head","link":"/articles/steinberg-staging-of-osteonecrosis-of-the-femoral-head?lang=us"}],"alsoUsedIn":[],"stem":"\u003cp\u003eAccording to\u0026nbsp;\u003cstrong\u003eSteinberg classification\u003c/strong\u003e, which of the following features describes\u0026nbsp;stage III\u0026nbsp;of avascular necrosis of hip?\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/1947"}],"attemptsPercentages":[{"alternativeId":"9686","percentage":24},{"alternativeId":"9685","percentage":2},{"alternativeId":"9690","percentage":59},{"alternativeId":"9687","percentage":13},{"alternativeId":"9688","percentage":2},{"alternativeId":"9689","percentage":0}],"promptToLogin":false,"questionManager":false,"articleId":"ficat-and-arlet-classification-of-osteonecrosis-of-the-femoral-head"}