Long-term complete response in stage IVa esophageal squamous cell carcinoma treated with chemoradiotherapy and modulated electro-hyperthermia: A case report

Figure 4 Radiotherapy planning images demonstrating gross tumor and planning target volumes. A-C: Representative axial (A), sagittal (B), and coronal (C) views from volumetric modulated arc therapy radiotherapy treatment planning are shown. The gross tumor volume and involved lymphadenopathy regions were delineated for a sequential boost irradiation (green line), delivering a total dose of 59.4 Gy in 33 fractions, while maintaining dose constraints for surrounding normal organs. The cyan line represents the planning target volume; D: Three-dimensional reconstruction of the target volumes.