Acromioclavicular Sprains
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þ X-rays for AC sprains?
  - Weighted films are totally useless.
    [Bossart P, et al. Lack of efficacy of weighted radiographs in diagnosing
    acute acromioclavicular separation. Ann Emeg Med 1988; 17:20.]
  - "shoulder pointer" = 1st degree AC sprain (tender but no instability)