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Reflex sympathetic dystrophy: a complication of interscalene block.

Interscalene block of the brachial plexus is a reliable means for providing anesthesia of the shoulder and upper extremity. As with all anesthetic techniques, there are potential complications. The following case illustrates the occurrence of reflex sympathetic dystrophy (RSD) after an interscalene block with 3% 2chloroprocaine. To the best of our knowledge, there is no previous case in the literature of RSD associated with interscalene block.