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Doctor insights on: How Does An I Screen Fecal Occult Blood Test Detect Colon Cancer

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How does an iscreen fecal occult blood test detect colon cancer?

How does an iscreen fecal occult blood test detect colon cancer?

No: A fecal occult test tests for blood in the stool. Colon cancer can be a cause but so can colon polyps, hemorrhoids, stomach ulcer and many other causes. Anyone with a positive fobt test should have further work up done to evaluate where the blood is coming from. ...Read more

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Dr. Barry Rosen
4,224 doctors shared insights

Cancer (Definition)

Cancer is a group of diseases that is characterized by uncontrolled cell growth leading to invasion of surrounding tissues that spread to other parts of the body. Cancer can begin anywhere in the body and is usually related to one or more genetic mutations that allow normal cells to become malignant by interfering with internal cellular control mechanisms, such as programmed cell death or by preventing ...Read more


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Can colon cancer be diagnosed on a fecal occult blood test?

Can colon cancer be diagnosed on a fecal occult blood test?

FOBT is screen: Fobt is designed to test for blood in stool. Blood in stool may be due to any bleeding in the GI tract from the gums to the anus; and there are false positives also. If fobt is positive, colonoscopy is generally recommended to look of colon cancer. Fobt per se is not a diagnostic test for cancer, just blood in stool. ...Read more

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Can a fecal occult blood test tell me if I have colon cancer?

Can a fecal occult blood test tell me if I have colon cancer?

No: Occult blood in stool suggests a point of bleeding from area near appendix across the colon to the rectum. This could be AV malformation, bleeding polyp, tumor, hemmorhoid or fissure. When blood is detected it has to be defined as to origin. Occassionally colonoscopy will reveal a lesion. Newer stool tests for tumor protein more accurate. ...Read more

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Could a fecal occult blood test tell me if I have colon cancer ?

Could a fecal occult blood test tell me if I have colon cancer ?

Well..: It could show blood in the stool which could mean cancer but not all blood in the stool means cancer and not all colon cancers will have a positive test. Blood in the stool, especially if the patient is anemic, should be evaluated further. ...Read more

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If colon cancer was causing pain RUQ wouldn't it be big enough to show on CT of abdomen and pelvis? 31 yo- fecal occult blood negative

If colon cancer was causing pain RUQ wouldn't it be big enough to show on CT of abdomen and pelvis? 31 yo- fecal occult blood negative

Not likely colon Ca: Classic colon cancer causes pain via colon obstruction, so in that case, CT would see it. But this would not be expected in a 31 yo w/ occult neg stool. RUQ pain can be any number of causes in young adult. Need to know more history and clinical exam by a Dr. to advise work up. Best screen for colon Ca is colonoscopy, but unless strong family history, may start around 50 yrs old. ...Read more

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How much percentage of people have Cancer when Fecal occult blood test is positive ?I waiting fora follow up appointment with a GI Dr.

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. ...Read more

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Results of fecal occult blood test came back positive on 1 of 3 test strips doctor has referred me to get colonoscopy and EGD. Am worried about cancer?

Results of fecal occult blood test came back positive on 1 of 3 test strips doctor has referred me to get colonoscopy and EGD. Am worried about cancer?

FOBT.: While cancer is of course on the list of possibilities, a positive fecal occult blood test in no way diagnoses someone with cancer. There are many other benign possibilities. But investigations are necessary as treatment may be necessary for even a benign finding. ...Read more

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I waiting to see a GI Dr for positive fecal occult blood test. Having heavy aching and bloating feeling in lower ab If it gets worse should I go ER?

I waiting to see a GI Dr for positive fecal occult blood test.  Having heavy aching and bloating feeling in lower ab If it gets worse should I go ER?

It depends: If you start to see blood or something that looks like coffee grounds in stool, get weak or dizzy or get severe pain or fever, or cannot pass any stool you should. Otherwise, let the doc who referred you to the GI that you are now having more symptoms and see if your appointment can be moved up. ...Read more

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Where can I buy a fecal occult blood test online?

Where can I buy a fecal occult blood test online?

Best see your doctor: There are 4 main types. Fecal immunochemical testing (fit)/immunochemical fecal occult blood test (ifobt), stool guaiac test for fecal occult blood (gfobt), fecal porphyrin quantification (hemoquant), and fecal dna test or pregen-plus. The stool guiac is the most proven, and can be done at home. But it is best to see your doctor since he/she can order it and a positive test must be followed up. ...Read more

Fecal Occult Blood (Definition)

Fecal occult blood testing is a tool you use at home to detect tiny amounts of blood in your stool. This may suggest that there is a polyp or cancer as the cause of the bleeding. Although the vast majority of positive tests for occult blood do not have a cancer, a positive result means you should have another test (such as colonoscopy) ...Read more


Dr. Eric Kaplan
923 doctors shared insights

Colon Cancer (Definition)

Final few yards of your intestine, between the terminal ileum (small bowell) and rectum. It squeezes water and solidifies waste to stool. It is subject to outpouching (divertics) polyps, and these can become cancers. The cells are abnormal, invade into the muscle and travel ...Read more