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Chloroquine-induced bilateral anterior shoulder dislocation: a unique aetiology for a rare clinical problem
  1. Alexander Nicholas Martin,
  2. Dimitris Tsekes,
  3. William James White,
  4. Dan Rossouw
  1. Department of Trauma and Orthopaedics, Barnet and Chase Farm Hospital, London, UK
  1. Correspondence to Alexander Nicholas Martin, alexandermartin{at}


Bilateral anterior shoulder dislocation is a rare clinical entity with few case reports and limited series published in the literature. Bilateral shoulder dislocations are rare and of them, most are posterior. We present a highly unusual case of bilateral, atraumatic, anterior shoulder dislocation with concomitant comminuted greater tuberosity fracture on the right side, secondary to seizure, in a patient without known epilepsy, induced by oral chloroquine medication. We demonstrate the treatment approach that led to a satisfactory clinical outcome, evidenced by radiological union, clinical assessment and Patient Reported Outcome Measure data, following non-operative management of both shoulders. The unusual mechanism for anterior shoulder dislocation, the asymmetric dislocation pattern and peculiar precipitant for the causative seizure all provide interesting learning points from this case.

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