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Imaging of shoulder instability

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Abstract

The shoulder enjoys the widest range of motion of all the joints in the human body, therefore requires a delicate balance between stability and motility. The glenohumeral joint is inclined to fall into two main instability categories: macro and micro. Macroinstability can be traumatic or atraumatic, with anterior or posterior dislocation of the humeral head. Microinstability falls within the broader section of acquired instability in overstressed shoulder caused by repeated joint stress. Anterior traumatic instability is the most frequent entity and a relatively common injury in young and athletic population. While shoulder instability is a clinical diagnosis, imaging impacts the patient management by detailing the extent of injury, such as capsulo-labral-ligamentous tears, fracture, and/or dislocation, describing the predisposing anatomic conditions and guide the therapetic choice. The aim of this comprehensive review is to cover the imaging findings of shoulder instability by different imaging techniques.

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Authors and Affiliations

  1. Department of Medicine and Surgery (DiMec), Section of Radiology, University of Parma, Maggiore Hospital, Via Gramsci 14, 43126, Parma, Italy

    Massimo De Filippo

  2. Department of Medicine and Surgery (DiMeC), Section of Radiology, University of Parma, Via Gramsci 14, 43126, Parma, Italy

    Silvia Schirò

  3. Department of Radiology, University of California Davis, 4860 Y Street, Sacramento, CA, 95817, USA

    Dani Sarohia

  4. Department of Biotechnological and Applied Clinical Sciences, University of L’Aquila, Ospedale San Salvatore, L’Aquila, Italy

    Antonio Barile

  5. Department of Radiology and Nuclear Medicine, Centre Henri Becquerel, Rue D’Amiens, 76000, Rouen, France

    Luca Saba

  6. Department of Medicine and Surgery, Unit of Radiologic Science, University of Parma, Maggiore Hospital, Via Gramsci 14, Parma, Italy

    Simone Cella

  7. Shoulder Unit, Humanitas Researche Hospital, Via Manzoni 56 Rozzano, Milan, Italy

    Alessandro Castagna

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  1. Massimo De Filippo
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De Filippo, M., Schirò, S., Sarohia, D. et al. Imaging of shoulder instability. Skeletal Radiol 49, 1505–1523 (2020). https://doi.org/10.1007/s00256-020-03459-z

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