Complex regional pain syndrome classification

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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]

Classification

The International Association for the Study of Pain has divided CRPS into two types based on the presence of nerve lesion following the injury.

• Type I, also known as reflex sympathetic dystrophy (RSD), Sudeck's atrophy, Reflex neurovascular dystrophy (RND) or algoneurodystrophy, does not have demonstrable nerve lesions.
• Type II, also known as causalgia, has evidence of obvious nerve damage.