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Doctor insights on: Does Colon Cancer Show Up In Blood Tests

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Are occult blood tests for colon cancer reliable?

Are occult blood tests for colon cancer reliable?

Screening: It is a good start specially of yo had before and they were normal. ...Read more

Dr. Barry Rosen
4,344 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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Are occult blood tests for colon cancer effective?

Are occult blood tests for colon cancer effective?

Guaiacs-: Are actually tests of thin films of stool to discern if there is hidden blood beneath visiblity, so-called "occult blood". It is a great screen, that if positive leads to a closer, less comfortable, more expensive test: colonoscopy. After 50, you get one per decade without occult blood in stool! ...Read more

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What are the blood tests after being diagnosed with stage 1 colon cancer?

What are the blood tests after being diagnosed with stage 1 colon cancer?

Establishes baseline: You will almost certainly have normal liver functions, blood counts, and CEA at present, but these will be monitored into the future. Any change can be an early sign of cancer recurrence, so continue to get checkups! I have had many patients who neglected their cancer follow up and died as a result. ...Read more

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Can chemo for colon cancer lead to painful urination (blood tests ruled out uti)? And advice to treat the pain?

Can chemo for colon cancer lead to painful urination (blood tests ruled out uti)? And advice to treat the pain?

Best is: To discuss with your oncologist regarding any known side effects of the chemo drugs being used. Pain could be related to your prior colon surgery also so a meeting with the surgeon would be reasonable as well. With no more information it is difficult to give you any more detailed answer. ...Read more

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Does a intestinal or colon cancer show in a blood test thru the WBC? And if there is no bleeding is it possible to be cancer?

Does a intestinal or colon cancer show in a blood test thru the WBC? And if there is no bleeding is it possible to be cancer?

No and yes: There is a blood test that we use in colon cancer, however it is not advised for screening.

There can be colon cancer without bleeding. Only 25% of colon cancers present with bleeding. ...Read more

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Doctor said to my dad he have colon cancer but the biopsy result was ok it show that is just polip. His blood test was ok aswell. What we should do now?

Doctor said to my dad he have colon cancer but the biopsy result was ok it show that is just polip. His blood test was ok aswell. What we should do now?

Repeat colonoscopy: Unless the pathology report comes back on the polyp as showing malignancy, he will need to have a follow-up colonoscopy to look for new polyps in the future (1-3 years). The timing will depend on risk factors, such as a history of ulcerative colitis, strong family history, completeness of colonoscopy, biopsy findings. If the pathology shows cancer, he should see a colorectal or general surgeon. ...Read more

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Wouldn't a blood test or cat scan show stomach or colon cancer.?

Wouldn't a blood test or cat scan show stomach or colon cancer.?

Not if early: A ct is not sensitive enough to find very small colon growths. There is a blood test the CEA that is high in some cancers, but usually only when quite advanced and not specific to colon cancer. Now, a ct might suggest a colon cancer, however, colonoscopy is considered the gold standard for detecting colon growths. There is research into high definition ct but it is not considered a standard. ...Read more

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My sister is on chemotherapy (folfox for metastatic colon cancer). Recent blood test shows high WBC (14, 000) and platelets (429). Is this okay?

My sister is on chemotherapy (folfox for metastatic colon cancer). Recent blood test shows high WBC (14, 000) and platelets (429). Is this okay?

No worries.: High WBC can be due to many causes: infection, stress, steroid use, dehydration, or the use of growth factor (such as neupogen). If there is no evidence of infection, then there is nothing to worry about. High platelet count is not uncommon since it is a body's reaction to stress of any cause (platelet is an acute phase reactant). Again, nothing to worry about. All the best, hk. ...Read more

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If colon cancer was present would something show up in routine blood work?

If colon cancer was present would something show up in routine blood work?

Depends: Some times colon cancer can cause anemia and abnormal liver functions but not sensitive and specific enough. Cea is used to moniter patients with a history of colon cancer but not to make a diagnosis. ...Read more

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Blood test for constipation from colon cancer?

Blood test for constipation from colon cancer?

No good test: There is no good blood test for either constipation or colon cancer. In late colon cancer CEA levels are usually elevated, but there are other causes of elevated cea. ...Read more

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How accurately will a fecal test find early stage colon cancer? The one that looks for cancer blood markers. Please help!! Approximate percentage.

How accurately will a fecal test find early stage colon cancer? The one that looks for cancer blood markers. Please help!! Approximate percentage.

Pretty low: Conventional assessment of colorectal cancer (CRC) risk largely involves detection of non-dysplastic adenomatous polyps. Standardized sensitivity was 48.2%, for CRC stages I-IV, values were 35.0%, 63.0%, 46.0% and 77.4%, respectively. Specificity was 91.5%. Sensitivity for advanced adenomas was low (11.2%). Ref: Mol Diagn Ther. 2014 Apr;18 (2):127 & Gut. 2014 Feb;63 (2):317 ...Read more

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IFOBT test Dec 2014, no occult blood. April 2nd, 2015 minor rectal bleeding, stop 1 day after. April 17th, 2015 started again. I'm 22. Colon cancer?

IFOBT test Dec 2014, no occult blood. April 2nd, 2015 minor rectal bleeding, stop 1 day after. April 17th, 2015 started again. I'm 22. Colon cancer?

Possibly hemorrhoids: Most rectal bleed is usually from hemorrhoids, cancer is extremely rare especially at this age, but needs to be ruled out, therefore a specialist either general surgeon or gastroenterologist is necessary. ...Read more

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I had a blood test done at my doctor and everything was normal. He said this means I probably don't have Colon cancer. Could I still have colon cancer?

I had a blood test done at my doctor and everything was normal. He said this means I probably don't have Colon cancer. Could I still have colon cancer?

Yes: To rule in or out colon cancers, colonoscopy is mandatory. That said, given your age it is not likely that you have colon cancer. Your family history and your symptoms may help in deciding if you do need a colonoscopy. ...Read more

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My blood work shows high mpv and low ferritin what could This be? Can low ferritin be colon cancer? And high MPV I read can mean risk of stroke

My blood work shows high mpv and low ferritin what could This be? Can low ferritin be colon cancer? And high MPV I read can mean risk of stroke

Iron deficiency: Not to worry. At your age, unless it runs in the family, there is extremely low chance this is colon cancer. Likely what your tests say is that you just have a little iron deficiency. This is very common to see in young healthy females as a result of menstrual periods and not enough dietary iron intake. The elevated MPV is likely due to secondary effects of the iron deficiency. Keep your follow up ...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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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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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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I have stage 2 colon cancer and just had a colectomy the oncologist is performing an expensive blood test to see next steps what is this test?

I have stage 2 colon cancer and just had a colectomy the oncologist is performing an expensive blood test to see next steps what is this test?

Just ask: May be a CEA level. This is a marker commonly used to follow colorectal cancer patients to indicate a possible recurrence. In sure your oncologist would be happy to explain it to you. All you have to do is ask. Best if luck. Hope this helps! ...Read more

Dr. Ana Adelstein
13 Doctors shared insights

Colon (Definition)

The colon is another term for the large intestine. This is the final portion of the digestive system, responsible for absorbing water and storing stool before evacuation. It is divided into sections described as cecum; ascending, transverse, descending and ...Read more


Dr. Qamar Khan
12 Doctors shared insights

Colonic (Definition)

This is a combining term referring to some condition, treatment or disease of the colon. Such as colonic enema, colonic ...Read more