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Vancouver, WA
A 55-year-old female asked:

How much percentage of people have cancer when fecal occult blood test is positive ?i waiting fora follow up appointment with a gi dr.

1 doctor answer1 doctor weighed in
Dr. Myron Arlen
Surgical Oncology 64 years experience
Small incidence: About 25% of positive fecal occult blood tests are associated with cancer. The majority of the tests miss a cancer which may not release blood into stool or detect blood from intermal hemorrhoids or fissures in rectum. Blood tests to define gene mutations more accurate but don't guarantee tumor presence, only potential for developing malignancy. New tests detect shed tumor protein in stool.

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Last updated Feb 21, 2015

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