Radiotherapy has become an integral part of the treatment of colorectal
cancer. Radiotherapy is used as adjuvant therapy in combination with chemotherapy or
surgery. In the article, various types of radiotherapy are explained and also the factors
involved in the selection of radiotherapy. There have been many clinical trials for
investigating the efficacy of various novel radiotherapies, which may show some
promising results. Radiotherapy can be adjuvant or neoadjuvant in the combination of
first-line therapy to increase the overall effectiveness of the treatment.
Keywords: Colon, Radiotherapy, Rectum.
