Question 2973
{"accessible":false,"alternatives":[{"id":14469,"text":"lower extremity appears lengthened and externally rotated"},{"id":14470,"text":"femoral head displaced anterior and inferior to the acetabulum on AP pelvic x-ray"},{"id":14471,"text":"femoral head appears larger than the contralateral hip due to geometric magnification on AP x-ray"},{"id":14472,"text":"lesser trochanter is often obscured on the AP view due to internal rotation "},{"id":14473,"text":"lower extremity is abducted and externally rotated"}],"archived":false,"correctAlternativeId":14472,"explanation":"\u003cp\u003eThe \u003cstrong\u003elesser trochanter\u003c/strong\u003e is often obscured on the AP view due to internal rotation. In the clinical examination of a posterior hip dislocation, the affected lower extremity is typically shortened, adducted, and internally rotated, which can lead to the obscuration of the lesser trochanter on an AP pelvic x-ray. \u003c/p\u003e\u003cp\u003eThe femoral head is usually displaced posterior, superior, and slightly lateral to the acetabulum and appears smaller than the contralateral hip on a well-centered AP film due to geometric magnification, distinguishing it from an anterior dislocation.\u003c/p\u003e","id":2973,"imageUrl":null,"imageAttribution":null,"imageAttributionCaseInfo":null,"firstQuestionPath":"/questions/2973","nextQuestionPath":null,"relatedArticles":[{"id":7265,"title":"Posterior dislocation of the hip","link":"/articles/posterior-dislocation-of-the-hip?lang=us"},{"id":29197,"title":"Hip dislocation","link":"/articles/hip-dislocation?lang=us"}],"alsoUsedIn":[{"id":1794,"kind":"Course","title":"X-ray Interpretation: Pelvis \u0026 Hip Injuries - page 1794","link":"https://radiopaedia.org/courses/x-ray-interpretation-pelvis-hip-injuries/pages/1794"}],"stem":"\u003cp\u003eIn the case of a posterior dislocation of the hip, which of the following clinical and radiographic features is MOST commonly observed?\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/2973"}],"attemptsPercentages":[{"alternativeId":"14473","percentage":23},{"alternativeId":"14470","percentage":5},{"alternativeId":"14471","percentage":15},{"alternativeId":"14472","percentage":48},{"alternativeId":"14469","percentage":9}],"promptToLogin":false,"questionManager":false,"articleId":"anterior-dislocation-of-the-hip"}