title: Unilateral duplication of the acromioclavicular joint: case report and literature review.
abstract: Clavicle duplication is a rare anatomical variation of the scapular belt: only seven cases have been reported in the literature to date, and only one took note of the existence of a duplication of the acromioclavicular joint. Two hypotheses have been proposed to interpret this variation: genetic factors, or trauma occurred in the growth period. Clavicle duplication should not be mistaken for a quite frequent coracoclavicular joint widely described. The authors report the case of a left acromioclavicular joint duplication in a 51-year-old male patient presenting with left shoulder pain. This case was the first of literature providing 3D CT-scan images.
authors.affiliation: Department of Orthopaedic Surgery and Traumatology, Universitary Hospital of Dijon, 14 rue Gaffarel, 1079, Dijon Cedex, France.
authors.forename: Brice
authors.initials: B
authors.lastname: Viard
authors.forename: Jean-Sébastien
authors.initials: JS
authors.lastname: Karp
authors.forename: Julien
authors.initials: J
authors.lastname: Tremlet
authors.forename: Zahed
authors.initials: Z
authors.lastname: Asali
authors.forename: Pierre
authors.initials: P
authors.lastname: Trouilloud
authors.forename: Olivier
authors.initials: O
authors.lastname: Trost
mesh_terms: D000173:Acromioclavicular Joint / Q000002:abnormalities* / Q000000981:diagnostic imaging* / Q000601:surgery; D002968:Clavicle / Q000000981:diagnostic imaging / Q000293:injuries*; D005500:Follow-Up Studies; D006801:Humans; D021621:Imaging, Three-Dimensional; D008297:Male; D008875:Middle Aged; D019637:Orthopedic Procedures / Q000379:methods; D020127:Recovery of Function; D018570:Risk Assessment; D012783:Shoulder Dislocation / Q000000981:diagnostic imaging* / Q000601:surgery; D020069:Shoulder Pain / Q000175:diagnosis / Q000209:etiology; D014057:Tomography, X-Ray Computed / Q000379:methods; D016896:Treatment Outcome
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