title: Case report: Floating-clavicle from the 17th century: the oldest case?
abstract: BACKGROUND
  Dislocation of both ends of the clavicle is a rare traumatic lesion and the mechanism of the lesion is usually related to major trauma. The first case was described in 1831.
  
  
  METHODS
  We present the oldest referenced case of this alteration. The skeleton studied belonged to an old woman buried inside the Sant Pere de Madrona Church in Berga (Barcelona/Spain) and its dating indicated it corresponded to the end of the 17th century. There was a pseudarthrosis between the clavicle and coracoid ligament; when the bones were reconstructed by pseudarthrosis both ends of the clavicle appeared dislocated.
  
  
  METHODS
  Bipolar dislocation of both ends of the clavicle, or "floating-clavicle", is a rare injury. Since 1831 when this type of injury was first reported, approximately 40 cases have been published. No archaeological case has been published.
  
  
  CONCLUSIONS
  Despite experiencing bipolar dislocation of both ends of the clavicle, or floating-clavicle, it is possible to have acceptable function of the arm as suggested by the anthropologic parameters analyzed here. The head of the humerus of the affected shoulder shows no abnormalities and the contralateral glenoid cavity shows severe osteochondritis of the anteroinferior side.
authors.affiliation: Unitat d'Antropologia Biològica, Departament de Biologia Animal, Biologia Vegetal i Ecologia, Universitat Autònoma de Barcelona, Bellaterra, Spain .
authors.forename: Josep
authors.initials: J
authors.lastname: Liria
authors.forename: Susana
authors.initials: S
authors.lastname: Carrascal
authors.forename: Mariano
authors.initials: M
authors.lastname: Fernández-Fairén
authors.forename: Assumpció
authors.initials: A
authors.lastname: Malgosa
authors.forename: Albert
authors.initials: A
authors.lastname: Isidro
mesh_terms: D000883:Anthropology; D002968:Clavicle / Q000000981:diagnostic imaging / Q000293:injuries / Q000473:pathology; D005260:Female; D049670:History, 17th Century; D006801:Humans; D004204:Joint Dislocations / Q000000981:diagnostic imaging / Q000266:history* / Q000473:pathology; D008875:Middle Aged; D011542:Pseudarthrosis / Q000000981:diagnostic imaging / Q000266:history* / Q000473:pathology; D011859:Radiography; D013030:Spain