title: Radiation as primary therapy for rectal carcinoma.
mesh_terms: D000230:Adenocarcinoma / Q000532:radiotherapy* / Q000601:surgery; D000368:Aged; D003036:Cobalt Isotopes; D003125:Colostomy; D003452:Cryosurgery; D003967:Diarrhea / Q000209:etiology; D004564:Electrocoagulation; D005500:Follow-Up Studies; D006801:Humans; D008875:Middle Aged; D009362:Neoplasm Metastasis; D010166:Palliative Care; D011878:Radiotherapy / Q000009:adverse effects; D012004:Rectal Neoplasms / Q000532:radiotherapy* / Q000601:surgery
chemical_list: D003036:Cobalt Isotopes