Dr. Jae Sung Lee is a professor in the Department of Orthopaedic Surgery at Chung-Ang university medical center. He completed his hand and upper extremity surgery fellowship in 2005 at Samsung Medical Center in Seoul and research fellowship in Wake Forest Institute of Regenerative Medicine, Winston-Salem, NC. He has experienced a lot of hand and upper extremity surgery. He has a particular interest in arthroscopic procedures of wrist and elbow joint, soft tissue injuries (including nerve, tendon, ligaments) and all fractures of upper limb