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Erythromelalgia in a 77-year-old woman

A 77-year-old woman with longstanding polycythemia vera had a 6-month history of increasingly prolonged episodes of redness, swelling, and burning pain in her extremities. The severity and sites of involvement varied with each episode. At presentation, she was unable to ambulate without assistance. (Source: Herbert L Fred and Hendrik A van Dijk. Courtesy of Wikimedia Commons. Creative Commons Attribution License CC BY 2.0.)

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