Question 1798
{"accessible":true,"alternatives":[{"id":8932,"text":"achondrogenesis"},{"id":8933,"text":"achondroplasia"},{"id":8934,"text":"campomelic dysplasia"},{"id":8935,"text":"chondroectodermal dysplasia (Ellis-van Creveld syndrome)"},{"id":8936,"text":"thanatophoric dysplasia"}],"archived":false,"correctAlternativeId":8933,"explanation":"\u003cp\u003eThis frontal radiograph demonstrates decrease\u0026nbsp;acetabular angle with horizontal acetabular roof bilaterally, small squared iliac wings (\u003ca href=\"https://radiopaedia.org/articles/tombstone-iliac-wings?lang=gb\"\u003etombstone\u003c/a\u003e\u0026nbsp;or\u0026nbsp;\u003ca href=\"https://radiopaedia.org/articles/tombstone-iliac-wings?lang=gb\"\u003emickey mouse ear pelvis\u003c/a\u003e) with\u0026nbsp;\u003ca href=\"https://radiopaedia.org/articles/champagne-glass-pelvis-achondroplasia?lang=gb\"\u003echampagne glass type pelvic inlet\u003c/a\u003e\u0026nbsp;and short/bowed long bones (mainly of the femora). These radiographic features are most consistent with an achondroplasia.\u003c/p\u003e\u003cp\u003eThe differential diagnosis includes other less common\u0026nbsp;skeletal dysplasias:\u003c/p\u003e\u003cul\u003e\n\u003cli\u003e\u003cp\u003eachondrogenesis\u003c/p\u003e\u003c/li\u003e\n\u003cli\u003e\u003cp\u003ecampomelic dysplasia\u003c/p\u003e\u003c/li\u003e\n\u003cli\u003e\u003cp\u003ethanatophoric dysplasia\u003c/p\u003e\u003c/li\u003e\n\u003cli\u003e\u003cp\u003echondroectodermal dysplasia\u0026nbsp;(Ellis-van Creveld syndrome)\u003c/p\u003e\u003c/li\u003e\n\u003c/ul\u003e","id":1798,"imageUrl":"https://prod-images-static.radiopaedia.org/multiple_choice_questions/288/achondroplasia-20_big_gallery.jpeg","imageAttribution":{"kind":"case","rID":82470},"imageAttributionCaseInfo":{"title":"Achondroplasia","contributor_name":"Ammar Haouimi","contributor_param":"ammar-haouimi","case_rid":82470,"case_param":"achondroplasia-20"},"firstQuestionPath":"/questions/1798","nextQuestionPath":null,"relatedArticles":[{"id":837,"title":"Achondroplasia","link":"/articles/achondroplasia?lang=us"},{"id":7325,"title":"Thanatophoric dysplasia","link":"/articles/thanatophoric-dysplasia?lang=us"},{"id":13275,"title":"Achondrogenesis","link":"/articles/achondrogenesis?lang=us"},{"id":14892,"title":"Lethal skeletal dysplasias","link":"/articles/lethal-skeletal-dysplasias?lang=us"},{"id":12224,"title":"Campomelic dwarfism","link":"/articles/campomelic-dwarfism-1?lang=us"}],"alsoUsedIn":[],"stem":"\u003cp\u003eA newborn with short limbs. An AP radiograph\u0026nbsp;of the pelvis and lower limbs was performed. What is the most likely diagnosis?\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/1798"}],"attemptsPercentages":[{"alternativeId":"8936","percentage":8},{"alternativeId":"8935","percentage":3},{"alternativeId":"8933","percentage":83},{"alternativeId":"8932","percentage":3},{"alternativeId":"8934","percentage":3}],"promptToLogin":false,"questionManager":false,"articleId":"chondroectodermal-dysplasia"}