A. Lee Dellon, MD, PhD was an invited speaker at the 21st World Institute of Pain held in Budapest, Hungary. This organization trains interventional pain physicians from around the world and doctors from 28 countries were at the meeting. Dr.Dellon spoke about the diagnosis of joint pain related to peripheral nerves, who to do the diagnostic nerve blocks, and then how to surgically denervate the shoulder, elbow, wrist, knee and ankle.