Pelvic Neoadjuvant Radiotherapy for Stage M1a Rectal Adenocarcinoma Patients Treated With Systemic Therapy Followed by Proctectomy and Metastasectomy: A Nationwide Retrospective Cohort Study

¹Department of Colorectal Surgery, China Medical University Hospital, Taichung, Taiwan, R.O.C.;
²School of Chinese Medicine, College of Chinese Medicine, China Medical University, Taichung, Taiwan, R.O.C.;
³Department of Surgery, China Medical University Hsinchu Hospital, Hsinchu, Taiwan, R.O.C.;
⁴School of Medicine, College of Medicine, China Medical University, Taichung, Taiwan, R.O.C.;
⁵Division of Hematology and Oncology, China Medical University Hospital, Taichung, Taiwan, R.O.C.;
⁶Department of Medical Imaging, China Medical University Hospital, Taichung, Taiwan, R.O.C.;
⁷Department of Pathology, China Medical University Hospital, Taichung, Taiwan, R.O.C.;
⁸Department of Radiation Oncology, China Medical University Hospital, Taichung, Taiwan, R.O.C.

Correspondence to: Chun-Ru Chien, MD, Ph.D., School of Medicine, College of Medicine, China Medical University, No.91 Hsueh-Shih Road, North District, Taichung 40402, Taiwan, R.O.C. E-mail: d16181{at}gmail.com