Arthroscopic subacromial decompression is traditionally performed through a posterolateral viewing portal and a lateral working portal. We describe the same procedure by using a posterolateral viewing portal and a posteromedial working portal. Because this portal is in the same sagittal plane as the ipsilateral acromioclavicular joint, it allows performing an arthroscopic excision arthroplasty of this joint.
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Declercq et al. (1999) studied this question.
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