In patients with thoracic/abdominal esophageal cancer with no clinical evidence of lymph node metastasis, there is no consensus about whether the irradiation field should include regional lymph nodes. In this study, the extent of the irradiation field for clinical stage T1-3N0M0 esophageal cancer was determined based on the postoperative pathological results.
Department of Radiation Oncology, Southern Tohoku Proton Therapy Center, 7-172, Yatsuyamada, Koriyama City, Fukushima 963-8052, Japan. tatsuya.nakamura@nifty.com
