Colorectal Cancer Prevention (PDQ®): Prevention - Patient Information [NCI] - What is prevention?
Cancer prevention is action taken to lower the chance of getting cancer.
Colorectal Cancer Screening (PDQ®): Screening - Health Professional Information [NCI] - Evidence of Benefit
Fecal Occult Blood Test (FOBT)In FOBT testing, a person collects stool samples that are analyzed for the presence of small amounts of blood. Collection details vary somewhat for different tests, but typically involve collection of as many as three different specimens on 3 different days, with small amounts from one specimen smeared by a wooden stick on a card with two windows or otherwise placed in a specimen container.The guaiac test identifies peroxidase-like activity that is characteristic of human and nonhuman hemoglobin. Thus, it will record blood from ingested meat, upper airway bleeding such as epistaxis, upper gastrointestinal (GI) bleeding, as well as colonic lesions.Five controlled clinical trials have been completed or are in progress to evaluate the efficacy of screening utilizing the FOBT. The Swedish trial is a targeted study for individuals aged 60 to 64 years. The
Rectal Cancer Treatment (PDQ®): Treatment - Patient Information [NCI] - Stages of Rectal Cancer
After rectal cancer has been diagnosed, tests are done to find out if cancer cells have spread within the rectum or to other parts of the body.The process used to find out whether cancer has spread within the rectum or to other parts of the body is called staging. The information gathered from the staging process determines the stage of the disease. It is important to know the stage in order to plan treatment. The following tests and procedures may be used in the staging process:Chest x-ray: An x-ray of the organs and bones inside the chest. An x-ray is a type of energy beam that can go through the body and onto film, making a picture of areas inside the body.CT scan (CAT scan): A procedure that makes a series of detailed pictures of areas inside the body, such as the abdomen, pelvis, or chest, taken from different angles. The pictures are made by a computer linked to an x-ray machine. A dye may be injected into a vein or swallowed to help the organs or tissues show up more clearly.
Colon Cancer Treatment (PDQ®): Treatment - Health Professional Information [NCI] - About This PDQ Summary
Purpose of This SummaryThis PDQ cancer information summary for health professionals provides comprehensive, peer-reviewed, evidence-based information about the treatment of colon cancer. It is intended as a resource to inform and assist clinicians who care for cancer patients. It does not provide formal guidelines or recommendations for making health care decisions.Reviewers and UpdatesThis summary is reviewed regularly and updated as necessary by the PDQ Adult Treatment Editorial Board, which is editorially independent of the National Cancer Institute (NCI). The summary reflects an independent review of the literature and does not represent a policy statement of NCI or the National Institutes of Health (NIH). Board members review recently published articles each month to determine whether an article should:be discussed at a meeting,be cited with text, orreplace or update an existing article that is already cited.Changes to the summaries are made through a consensus process in which
Colon Cancer Treatment (PDQ®): Treatment - Patient Information [NCI] - Treatment Option Overview
There are different types of treatment for patients with colon cancer. Different types of treatment are available for patients with colon cancer. Some treatments are standard (the currently used treatment), and some are being tested in clinical trials. A treatment clinical trial is a research study meant to help improve current treatments or obtain information on new treatments for patients with cancer. When clinical trials show that a new treatment is better than the standard treatment, the new treatment may become the standard treatment. Patients may want to think about taking part in a clinical trial. Some clinical trials are open only to patients who have not started treatment. Six types of standard treatment are used:SurgerySurgery (removing the cancer in an operation) is the most common treatment for all stages of colon cancer. A doctor may remove the cancer using one of the following types of surgery:Local excision: If the cancer is found at a very early stage, the doctor may
Colon Cancer Treatment (PDQ®): Treatment - Patient Information [NCI] - General Information About Colon Cancer
Colon cancer is a disease in which malignant (cancer) cells form in the tissues of the colon.The colon is part of the body's digestive system. The digestive system removes and processes nutrients (vitamins, minerals, carbohydrates, fats, proteins, and water) from foods and helps pass waste material out of the body. The digestive system is made up of the esophagus, stomach, and the small and large intestines. The first 6 feet of the large intestine are called the large bowel or colon. The last 6 inches are the rectum and the anal canal. The anal canal ends at the anus (the opening of the large intestine to the outside of the body).Anatomy of the lower digestive system, showing the colon and other organs.Gastrointestinal stromal tumors can occur in the colon. See the PDQ summary on Gastrointestinal Stromal Tumors Treatment for more information. See the PDQ summary about Unusual Cancers of Childhood for information about colorectal cancer in children.Health history can affect the risk of
Colon Cancer Treatment (PDQ®): Treatment - Health Professional Information [NCI] - Stage III Colon Cancer Treatment
Stage III colon cancer denotes lymph node involvement. Studies have indicated that the number of lymph nodes involved affects prognosis; patients with one to three involved nodes have a significantly better survival than those with four or more involved nodes.Standard Treatment Options for Stage III Colon CancerStandard treatment options for stage III colon cancer include the following:Surgery.Adjuvant chemotherapy.SurgerySurgery for stage III colon cancer is wide surgical resection and anastomosis.Evidence (laparoscopic techniques):The role of laparoscopic techniques [1,2,3,4] in the treatment of colon cancer was examined in a multicenter, prospective, randomized trial (NCCTG-934653, now closed) comparing laparoscopic-assisted colectomy (LAC) with open colectomy.Three-year recurrence rates and 3-year overall survival (OS) rates were similar in the two groups. (Refer to the Primary Surgical Therapy section in the Treatment Option Overview section of this summary for more
Colorectal Cancer Screening (PDQ®): Screening - Patient Information [NCI] - Get More Information From NCI
Call 1-800-4-CANCERFor more information, U.S. residents may call the National Cancer Institute's (NCI's) Cancer Information Service toll-free at 1-800-4-CANCER (1-800-422-6237) Monday through Friday from 8:00 a.m. to 8:00 p.m., Eastern Time. A trained Cancer Information Specialist is available to answer your questions.Chat online The NCI's LiveHelp® online chat service provides Internet users with the ability to chat online with an Information Specialist. The service is available from 8:00 a.m. to 11:00 p.m. Eastern time, Monday through Friday. Information Specialists can help Internet users find information on NCI Web sites and answer questions about cancer. Write to usFor more information from the NCI, please write to this address:NCI Public Inquiries Office9609 Medical Center Dr. Room 2E532 MSC 9760Bethesda, MD 20892-9760Search the NCI Web siteThe NCI Web site provides online access to information on cancer, clinical trials, and other Web sites and organizations that offer support
Colorectal Cancer Prevention (PDQ®): Prevention - Health Professional Information [NCI] - Overview
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 CancerExcessive alcohol useBased 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% confidence interval [CI], 1.16–1.72) for consumption exceeding 45 g/day.Study Design: Cohort studies.Internal Validity: Fair.Consistency: Fair.External Validity: Fair.Cigarette smokingBased on solid evidence, cigarette smoking is associated with increased incidence and mortality from CRC.Magnitude of Effect: A pooled analysis of 106 observational studies estimated an adjusted RR (current smokers vs. never smokers) for developing CRC of 1.18 (95% CI, 1.11–1.25).Study Design:
Rectal Cancer Treatment (PDQ®): Treatment - Health Professional Information [NCI] - Changes to This Summary (02 / 08 / 2013)
The PDQ cancer information summaries are reviewed regularly and updated as new information becomes available. This section describes the latest changes made to this summary as of the date above.General Information About Rectal Cancer Updated statistics with estimated new cases and deaths for 2013 (cited American Cancer Society as reference 1).This summary is written and maintained by the PDQ Adult Treatment Editorial Board, which is editorially independent of NCI. The summary reflects an independent review of the literature and does not represent a policy statement of NCI or NIH. More information about summary policies and the role of the PDQ Editorial Boards in maintaining the PDQ summaries can be found on the About This PDQ Summary and PDQ NCI's Comprehensive Cancer Database pages.