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Ganglion cysts are a common entity arising around joints and tendon sheaths. We present a previously unreported location for a ganglion and review the various theories on etiology, pathogenesis, and treatment. With yet another unusual location for ganglia, over the acromioclavicular joint, we propose ganglia should be considered in the differential diagnosis of masses arising near any synovial joint or tendon sheath.
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Burns et al. (1984) studied this question.
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