title: Radiation therapy: results and future possibilities.
mesh_terms: D001005:Anus Neoplasms / Q000532:radiotherapy; D002276:Carcinoid Tumor / Q000532:radiotherapy; D002294:Carcinoma, Squamous Cell / Q000532:radiotherapy; D003110:Colonic Neoplasms / Q000532:radiotherapy; D004938:Esophageal Neoplasms / Q000532:radiotherapy; D005706:Gallbladder Neoplasms / Q000532:radiotherapy*; D005770:Gastrointestinal Neoplasms / Q000532:radiotherapy* / Q000601:surgery; D006801:Humans; D008113:Liver Neoplasms / Q000532:radiotherapy*; D009362:Neoplasm Metastasis; D010190:Pancreatic Neoplasms / Q000532:radiotherapy*; D012004:Rectal Neoplasms / Q000532:radiotherapy; D013274:Stomach Neoplasms / Q000532:radiotherapy