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Colon Polyps - Symptoms

Colon polyps usually do not cause symptoms unless they are larger than 1 cm (0.4 in.) or they are cancerous. The most common symptom is rectal bleeding. Sometimes the bleeding may not be obvious (occult) and may only be discovered after doing a screening test for blood in the stool called a fecal occult blood test (FOBT).

Colon polyps usually do not cause pain or a change in bowel habits unless they are large and are blocking part of the colon. These symptoms are rare, because polyps usually are discovered and removed before they become large enough to cause problems.

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Colorectal Cancer Clinical Trials

Before doctors can prescribe new medications and treatments, they must be shown to be safe and effective. Colorectal cancerclinical trials allow test the effects of new medications on volunteers with colorectal cancer. The researchers follow a strict protocol and use carefully controlled conditions to evaluate the drugs being developed. The evaluation focuses on how well the drug treats colorectal cancer. Researchers also determine its safety and any possible side effects. Some patients with colorectal...

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After cancer develops, additional symptoms may occur, such as changes in bowel habits and significant weight loss.

    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.

    WebMD Medical Reference from Healthwise

    Last Updated: November 14, 2014
    This information is not intended to replace the advice of a doctor. Healthwise disclaims any liability for the decisions you make based on this information.
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