Purpose of the treatment is the removal of the epiphysis that causes the abnormal growth of the wrist. This is done by making a small incision at the volar-radial side. This approach passes the Flexor pollicis longus and Palmaris longus and leaves the Median nerve and Radial artery protected. Then the Pronator quadratus muscle is found and detached from the radius. Here a cut into the bone will find the abnormal epiphysis. When the epiphysis is clearly defined more bone is removed so the radius is in its normal position and prevents a new bone bar from forming. This is the end of the physiolisis. This is always combined with a Vickers Ligament release.