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This case highlights the need for a high index of suspicion for complications, even following common self-limiting injuries, when patients represent with symptoms that do not fit the usual natural history of the condition, particularly if they have risk factors for bleeding and infection.<\/jats:p>","DOI":"10.1136\/bcr-2015-211090","type":"journal-article","created":{"date-parts":[[2016,1,19]],"date-time":"2016-01-19T10:53:34Z","timestamp":1453200814000},"page":"bcr2015211090","update-policy":"https:\/\/doi.org\/10.1136\/crossmarkpolicy","source":"Crossref","is-referenced-by-count":1,"title":["Secondary infection of haematoma following closed acromioclavicular joint dislocation"],"prefix":"10.1136","volume":"2016","author":[{"given":"Leanne","family":"Dupley","sequence":"first","affiliation":[{"name":"Royal Blackburn Hospital, Blackburn, UK"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Andrew James","family":"Berg","sequence":"additional","affiliation":[{"name":"Pennine Acute Hospitals NHS Trust, Manchester, UK"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Randeep","family":"Mohil","sequence":"additional","affiliation":[{"name":"Royal Blackburn Hospital, Blackburn, UK"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"239","published-online":{"date-parts":[[2016,1,19]]},"reference":[{"key":"2025082701155983000_2016.jan19_1.bcr2015211090.1","first-page":"2564","article-title":"Effects of hook plate on shoulder function after treatment of acromioclavicular joint dislocation","volume":"7","author":"Chen","year":"2014","journal-title":"Int J Clin Exp Med"},{"key":"2025082701155983000_2016.jan19_1.bcr2015211090.2","doi-asserted-by":"publisher","DOI":"10.2165\/00007256-199111020-00004"},{"key":"2025082701155983000_2016.jan19_1.bcr2015211090.3","first-page":"261","article-title":"Acromioclavicular joint injuries","volume":"35","author":"Beim","year":"2000","journal-title":"J Athl Train"},{"key":"2025082701155983000_2016.jan19_1.bcr2015211090.4","unstructured":"Rockwood CA , Williams GR , Young DC . 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