Question 1

are occult blood tests for colon cancer reliable?

Accepted Answer

Not really: The sensitivity of occult blood test is very low -about 20-25% if it is done only once. If it is done in 3 separate occasions- the sensitivity of the test to check for GI bleeding will be higher up to 90%. However, the test's accuracy for colon cancer is not high as GI bleeding can be caused by so many things-hemorrhoids, avm, gastric ulcer etc. Colonsocopy needs to be done if occult blood is +.

Question 2

are occult blood tests for colon cancer effective?

Accepted Answer

Not optimal: Occult blood in stool (fobt) are helpful in detecting colon cancer and their use improves outcomes.  However, fobt by itself is not a treatment therefore it is not possible to comment on its effectiveness.  Colonoscopy is a much better screening test.

Question 3

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

Accepted Answer

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.

Question 4

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

Accepted Answer

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.

Question 5

make/29 non-smoker. i ordered a cea blood test and it came back at 3.2 is this high? im worried about colon cancer. grandmother had it at 48, but dad is fine?

Accepted Answer

: CEA is not a diagnostic test for cancer, any cancer. Given your history, you should get a colonoscopy by the time you turn 38 years of age. Discuss it with your doctor.
For info on CEA:
https://www.ucsfhealth.org/medical-tests/cea-blood-test#:~:text=The%20normal%20range%20is%200,to%205%20%C2%B5g%2FL).

Question 6

with the increase in colon cancer in young people i am 31 and have dealt with seeing fresh blood when i wipe or on top of my stool i tested positive for home stool fit test. how likely is it from colon cancer! im not having any other symptoms?

Accepted Answer

: Colon cancer is rare at you age. It is likely due to hemorrhoid if you are constipated. However, you should have a sigmoidoscopy done to confirm the hemorrhoid and ruling out mass.
Unfortunately, malignant lesion in the lesion is usually asymptomatic.

Question 7

blood test for constipation from colon cancer?

Accepted Answer

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.

Question 8

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?

Accepted Answer

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.

Question 9

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?

Accepted Answer

????: At age 20, it is unlikely you have colon cancer. It is not necessarily impossible, but why do you think you have colon cancer. Do you have anxiety issues? Do you have a family history of colon cancer? Have you been passing blood? This is too difficult question to answer in this setting.

Question 10

wouldnt colon cancer always show blood in stool test?

Accepted Answer

Maybe: Not all the time because you may only have intermediate blood.The best test is a colonoscopy.

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Doctor answers about:

What blood tests can detect colon cancer

A member asked:

Are occult blood tests for colon cancer reliable?

A member asked:

Are occult blood tests for colon cancer effective?

A member asked:

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

A member asked:

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

A member asked:

Make/29 non-smoker. i ordered a cea blood test and it came back at 3.2 is this high? im worried about colon cancer. grandmother had it at 48, but dad is fine?

A member asked:

With the increase in colon cancer in young people i am 31 and have dealt with seeing fresh blood when i wipe or on top of my stool i tested positive for home stool fit test. how likely is it from colon cancer! im not having any other symptoms?

A member asked:

Blood test for constipation from colon cancer?

A member asked:

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?

A member asked:

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?

A member asked:

Wouldnt colon cancer always show blood in stool test?

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