Prior to Surgery: Radiation and/or Chemotherapy Radiation therapy—either by itself or in combination with chemotherapy—is frequently suggested to reduce the size of the tumor and the need for a colostomy. Surgeons can determine which patients would benefit from presurgical treatment by evaluating the size and depth of the tumor using cutting-edge imaging techniques prior to surgery. Visit the best rectal cancer surgeon in Chandigarh now- https://drrajeevkapoor.com/rectal-cancer-surgery/