Dr. Hyun-Guy Kang is currently head of the Center for rare cancer at the National Cancer Center, South Korea, and adjunct professor of the International graduate school of cancer science and policy. Dr. Kang specializes in musculoskeletal oncology, sarcoma, and bone metastasis surgery. He strives to introduce innovative methods, including minimally invasive surgery for bone metastasis and 3D printing technology for bone reconstruction. He currently serves as vice president of the Korean Society of 3D Printing in Medicine and editor of the Korean Orthopaedic Association. He is a board member of the Korean Musculoskeletal Tumor Society. Dr. Kang writes and lectures extensively on the issues associated with 3D printing applications in bone tumor surgery both nationally and internationally. As an orthopaedic oncology surgeon, Dr. Kang continues to perform patient-specific 3D printing bone reconstruction, thus delivering the best functional results for patients.