title: Preoperative radiation therapy. A plan for combined therapy by the Radiation Therapy Oncology Group and the Central Oncology Group.
mesh_terms: D005069:Evaluation Studies as Topic; D006801:Humans; D008207:Lymphatic Metastasis; D009364:Neoplasm Recurrence, Local; D010347:Patient Care Planning; D011879:Radiotherapy Dosage; D012004:Rectal Neoplasms / Q000532:radiotherapy* / Q000601:surgery; D012811:Sigmoid Neoplasms / Q000532:radiotherapy* / Q000601:surgery; D012955:Societies, Medical; D014481:United States