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can a blood test detect colon cancer

A 55-year-old member asked:
Dr. Jonathan Warman
25 years experience Internal Medicine
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 caus ... Read More
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A 46-year-old member asked:
Dr. Gurmukh Singh
48 years experience Pathology
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 ... Read More
A 26-year-old female asked:
Dr. Mark Pack
Dr. Mark Pack answered
30 years experience General Surgery
????: 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 iss ... Read More
1
1 thank
A 46-year-old member asked:
Dr. Carlos Encarnacion
34 years experience Medical Oncology
Depends: A blood count may show anemia than can in turn be traced to a cancer anywhere in the GI tract. Also, if the cancer is advanced, tumor markers or liver ... Read More
A 56-year-old member asked:
Dr. Carl Van Wey
44 years experience Radiation Oncology
No: Gi bleeding can come from many causes, but the most serious is cancer. That is why it needs to be evaluated with endoscopy including biopsy of anythi ... Read More
2
2 thanks
A 37-year-old member asked:
Dr. Myron Arlen
63 years experience Surgical Oncology
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 po ... Read More
A 34-year-old male asked:
Dr. Robert Killian
27 years experience General Practice
Scanning for Cancer: Good morning: not necessarily. Blood tests for cancer are not very specific and not too reliable. A ct scan can pick up anatomical abnormalities ... Read More
1
1 thank
A 38-year-old member asked:
Dr. Carlos Encarnacion
34 years experience Medical Oncology
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 te ... Read More
A 61-year-old female asked:
Dr. Hamsa Jayaraj
53 years experience Internal Medicine
Age differs: You MUST go for colonoscopy.
1
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A 58-year-old female asked:
Dr. Soren Singel
28 years experience Neurosurgery
Ask the oncologist: Many different tests available - ask your oncologist.

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