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    Colorectal Cancer Health Center

    Medical Reference Related to Colorectal Cancer

    1. Colorectal Cancer, Metastatic or Recurrent - Risks of Colorectal Cancer Screening

      Screening tests have risks.Decisions about screening tests can be difficult. Not all screening tests are helpful and most have risks. Before having any screening test, you may want to discuss the test with your doctor. It is important to know the risks of the test and whether it has been proven to reduce the risk of dying from cancer.False-negative test results can occur.Screening test results may appear to be normal even though colorectal cancer is present. A person who receives a false-negative test result (one that shows there is no cancer when there really is) may delay seeking medical care even if there are symptoms.False-positive test results can occur.Screening test results may appear to be abnormal even though no cancer is present. A false-positive test result (one that shows there is cancer when there really isn't) can cause anxiety and is usually followed by more tests (such as biopsy), which also have risks.The following colorectal cancer screening tests have risks:Fecal

    2. Colon Cancer Treatment (PDQ®): Treatment - Health Professional Information [NCI] - Stage II Colon Cancer Treatment

      Standard Treatment Options for Stage II Colon CancerSurgeryStandard treatment options for stage II colon cancer include the following: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) to 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 information.)The quality-of-life component of this trial has been published and minimal short-term quality-of-life benefits with LAC were reported.[4][Level of evidence: 1iiC]Treatment Options Under Clinical EvaluationAdjuvant chemotherapyThe potential value of adjuvant chemotherapy for patients with stage II colon cancer remains

    3. Colorectal Cancer, Metastatic or Recurrent - Evidence of Harms

      Harms are associated with the various modalities used to screen for colorectal cancer (CRC).Fecal Occult Blood Testing (FOBT)A systematic review done through the Cochrane Collaboration examined all CRC screening randomized trials that involved FOBT on more than one occasion. The trials reported a low positive predictive value for the FOBT, suggesting that more than 80% of all positive tests were false-positives.[1] A positive test can lead to further diagnostic procedures that include colonoscopy or double-contrast barium enema plus flexible sigmoidoscopy.SigmoidoscopySigmoidoscopy can be an uncomfortable or painful procedure. Women may have more pain during the procedure, which may discourage them from returning for future screening sigmoidoscopies. Sigmoidoscopy can also cause perforation and bleeding, although this is rare.ColonoscopyClinically significant complications requiring medical intervention are rare but can include the following: perforations, bleeding, cardiovascular

    4. Colorectal Cancer, Metastatic or Recurrent - 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

    5. Colorectal Cancer, Metastatic or Recurrent - Stage IV and Recurrent Colon Cancer Treatment

      Stage IV colon cancer denotes distant metastatic disease. Treatment of recurrent colon cancer depends on the sites of recurrent disease demonstrable by physical examination and/or radiographic studies. In addition to standard radiographic procedures, radioimmunoscintography may add clinical information that may affect management.[1] Such approaches have not led to improvements in long-term outcome measures such as survival.Treatment Options for Stage IV and Recurrent Colon CancerTreatment options for stage IV and recurrent colon cancer include the following:Surgical resection of locally recurrent cancer.Surgical resection and anastomosis or bypass of obstructing or bleeding primary lesions in selected metastatic cases.Resection of liver metastases in selected metastatic patients (5-year cure rate for resection of solitary or combination metastases exceeds 20%) or ablation in selected

    6. Colorectal Cancer, Metastatic or Recurrent - Stage II Rectal Cancer

      Treatment options:Preoperative chemoradiation with fluorouracil (5-FU) for patients with clinically staged T3 or T4 rectal adenocarcinoma.Total mesorectal excision (TME) with either low anterior resection (LAR) or abdominoperineal resection (APR).Postoperative chemoradiation for patients with stage II or III rectal cancer who did not receive preoperative chemoradiation.Four to six months of 5-FU-based chemotherapy postoperatively.A clinical trial.Prior to the standard use of preoperative chemoradiation for stage II and III rectal cancer, several studies established the benefits of adjuvant combined-modality therapy for surgical stage II and III disease. Intergroup protocol 86-47-51 (MAYO-864751) demonstrated a 10% improvement in overall survival (OS) with the use of continuous-infusion 5-FU (225 mg/m2 /day throughout the entire course of radiation therapy) compared with bolus 5-FU (500 mg/m2 /day for three consecutive days during the first and fifth weeks of radiation).[1][Level of

    7. Colorectal Cancer, Metastatic or Recurrent - nci_ncicdr0000062687-nci-header

      This information is produced and provided by the National Cancer Institute (NCI). The information in this topic may have changed since it was written. For the most current information, contact the National Cancer Institute via the Internet web site at http://cancer.gov or call 1-800-4-CANCER.Colon Cancer Treatment

    8. Colorectal Cancer, Metastatic or Recurrent - Treatment Option Overview

      There are different types of treatment for patients with rectal cancer.Different types of treatment are available for patients with rectal 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.Four types of standard treatment are used:SurgerySurgery is the most common treatment for all stages of rectal cancer. The cancer is removed using one of the following types of surgery:Polypectomy: If the cancer is found in a polyp (a small piece of bulging tissue), the polyp is often removed during a

    9. Colorectal Cancer, Metastatic or Recurrent - nci_ncicdr0000258008-nci-header

      This information is produced and provided by the National Cancer Institute (NCI). The information in this topic may have changed since it was written. For the most current information, contact the National Cancer Institute via the Internet web site at http://cancer.gov or call 1-800-4-CANCER.Colorectal Cancer Screening

    10. Colorectal Cancer - 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:

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