Fig. 1From: Involved-field radiotherapy (IFRT) versus elective nodal irradiation (ENI) in combination with concurrent chemotherapy for 239 esophageal cancers: a single institutional retrospective studyBeam’s eye view of both ENI and IFRT for upper thoracic esophageal cancer (sky blue = gross tumor, red = ENI, and yellow = IFRT)Back to article page