Treatment outcomes of patients with salivary duct carcinoma undergoing surgery and postoperative radiotherapy

Dong Soo Lee, Chang Geol Lee , Ki Chang Keum, Seung Yeun Chung, Taehyung Kim, Hong-Gyun Wu, Jin Ho Kim, Myung-Whun Sung, Soon-Hyun Ahn, Kwan Ho Cho, Ki Mun Kang, Young-Taek Oh, Jin Hee Kim and Min Kyu Kang Department of Radiation Oncology, College of Medicine, The Catholic University of Korea, Seoul, South Korea; Department of Radiation Oncology, Yonsei University College of Medicine, Seoul, South Korea; Department of Radiation Oncology, Seoul National University College of Medicine, Seoul, South Korea; Cancer Research Institution, Seoul National University College of Medicine, Seoul, South Korea; Institute of Radiation Medicine, Medical Research Center, Seoul National University, Seoul, South Korea; Department of Otorhinolaryngology-Head and Neck Surgery, Seoul National University College of Medicine, Seoul, South Korea; Proton Therapy Center, Research Institute and Hospital, National Cancer Center, Goyang, South Korea; Department of Radiation Oncology, Gyeongsang National University School of Medicine and Gyeongsang National University Changwon Hospital, Jinju, South Korea; Department of Radiation Oncology, Ajou University School of Medicine, Suwon, South Korea; Department of Radiation Oncology, Keimyung University, School of Medicine, Daegu, South Korea; Department of Radiation Oncology, School of Medicine, Kyungpook National University, Daegu, South Korea