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A 72-year-old man with advanced glenohumeral and acromioclavicular arthritis presented with a painless mass over his left shoulder that had become progressively larger over a period of about a year (Panel A). His history was significant for childhood poliomyelitis, and he had been using crutches for more than 50 years. The initial radiograph of his left shoulder revealed advanced osteoarthritis of the glenohumeral and acromioclavicular joint (Panel B). Magnetic resonance imaging revealed a large synovial cyst over his left shoulder (Panel C). The cyst was aspirated and injected with methylprednisolone. The fluid culture was negative for aerobic bacteria. Examination by . . . [Full Text of this Article] |
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