title: Avulsion fracture of the fibula: the 'arcuate sign' of posterolateral knee instability.
mesh_terms: D000293:Adolescent; D005360:Fibula / Q000293:injuries*; D050723:Fractures, Bone / Q000150:complications*; D006801:Humans; D007593:Joint Instability / Q000000981:diagnostic imaging*; D007718:Knee Injuries / Q000000981:diagnostic imaging*; D008023:Ligaments, Articular / Q000293:injuries*; D008297:Male; D011859:Radiography