Treatment Options by Stage
A link to a list of current clinical trials is included for each treatment section. For some types or stages of cancer, there may not be any trials listed. Check with your doctor for clinical trials that are not listed here but may be right for you.
Stage 0 (Carcinoma in Situ)
Note: Separate PDQ summaries on Colorectal Cancer Screening; Colon Cancer Treatment; and Rectal Cancer Treatment are also available. Factors Associated With Increased Risk of Colorectal Cancer Excessive alcohol use Based on solid evidence from observational studies, excessive alcohol use is associated with an increased risk of colorectal cancer (CRC).[1,2,3] Magnitude of Effect: A pooled analysis of eight cohort studies estimated an adjusted relative risk (RR) of 1.41 (95%...
Treatment of stage 0 may include the following:
- Simple polypectomy.
- Localexcision.
- Resection (when the tumor is too large to remove by local excision).
- Internal or external radiation therapy.
Check for U.S. clinical trials from NCI's list of cancer clinical trials that are now accepting patients with stage 0 rectal cancer. For more specific results, refine the search by using other search features, such as the location of the trial, the type of treatment, or the name of the drug. General information about clinical trials is available from the NCI Web site.
Stage I Rectal Cancer
Treatment of stage I rectal cancer may include the following:
- Localexcision.
- Resection.
- Resection with radiation therapy and chemotherapy before or after surgery.
Check for U.S. clinical trials from NCI's list of cancer clinical trials that are now accepting patients with stage I rectal cancer. For more specific results, refine the search by using other search features, such as the location of the trial, the type of treatment, or the name of the drug. General information about clinical trials is available from the NCI Web site.
Stage II Rectal Cancer
Treatment of stage II rectal cancer may include the following:
- Resection plus a combination of chemotherapy and radiation therapy before or after surgery.
- Resection with or without chemotherapy after surgery.
- A clinical trial of a new treatment.
Check for U.S. clinical trials from NCI's list of cancer clinical trials that are now accepting patients with stage II rectal cancer. For more specific results, refine the search by using other search features, such as the location of the trial, the type of treatment, or the name of the drug. General information about clinical trials is available from the NCI Web site.
Stage III Rectal Cancer
Treatment of stage III rectal cancer may include the following:
- Resection plus a combination of chemotherapy and radiation therapy before or after surgery.
- Resection with or without chemotherapy after surgery.
- A clinical trial of a new treatment.
Check for U.S. clinical trials from NCI's list of cancer clinical trials that are now accepting patients with stage III rectal cancer. For more specific results, refine the search by using other search features, such as the location of the trial, the type of treatment, or the name of the drug. General information about clinical trials is available from the NCI Web site.
Stage IV and Recurrent Rectal Cancer
Treatment of stage IV and recurrentrectal cancer may include the following:
- Resection with or without a combination of radiation therapy and chemotherapy before surgery.
- Resection or pelvic exenteration, as palliative therapy to relieve symptoms and improve the quality of life.
- Radiation therapy, chemotherapy, or a combination of both, as palliative therapy to relieve symptoms and improve the quality of life.
- Chemotherapy to control the growth of the tumor.
- Placement of a stent to help keep the rectum open if it is partly blocked by the tumor, as palliative therapy to relieve symptoms and improve the quality of life.
- Systemic chemotherapy with or without monoclonal antibodytherapy, such as bevacizumab.
- A clinical trial of a new anticancer drug.
WebMD Public Information from the National Cancer Institute

