Local excision.
D001706:Biopsy / Q000009:adverse effects; D003110:Colonic Neoplasms / Q000401:mortality / Q000473:pathology / Q000532:radiotherapy / Q000601:surgery*; D005500:Follow-Up Studies; D006801:Humans; D008722:Methods; D009366:Neoplasm Seeding; D011182:Postoperative Care; D011230:Precancerous Conditions / Q000601:surgery*; D011379:Prognosis; D012004:Rectal Neoplasms / Q000401:mortality / Q000473:pathology / Q000532:radiotherapy / Q000601:surgery*