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does colon cancer show up in blood tests

A 46-year-old member asked:
Dr. Liawaty Ho
23 years experience Hematology and Oncology
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 ... Read More
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Dr. Rafael Lugo
28 years experience General Surgery
Screening: It is a good start specially of yo had before and they were normal.

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A 44-year-old member asked:
Dr. Gurmukh Singh
49 years experience Pathology
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 theref ... Read More
Dr. Addagada Rao
56 years experience General Surgery
Yes: Yes. Testing occult blood in the stool is very effective simple inexpensive test for screening for colon cancer, screening colonoscopy is most accu ... Read More
Dr. Andrew Turrisi
47 years experience Radiation Oncology
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 ... Read More
A 37-year-old member asked:
Dr. Scott Welker
27 years experience General Surgery
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 ... Read More
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A 34-year-old female asked:
Dr. Eric Kaplan
42 years experience Colon and Rectal Surgery
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 ... Read More
A female asked:
Dr. Herman Hammerstead
A Verified Doctor answered
A US doctor answered Learn more
Anemia: Bleeding with resultant decrease in Hgb. and Hct. is the most prominent change. There is no overall pattern that says "colon cancer"
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A 54-year-old male asked:
Dr. Robert Kneece
Specializes in Internal Medicine and Pediatrics
Maybe: Not all the time because you may only have intermediate blood.The best test is a colonoscopy.
A 26-year-old male asked:
Dr. Robert Killian
28 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
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1 thank
A 30-year-old female asked:
Dr. Luis Villaplana
35 years experience Internal Medicine
NO AND YES: Not all cancers bleed, and elevated or low WBC count is not specific for colon cancer. If undiagnosed, it will obstruct the flow of fecal material and ... Read More
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A 23-year-old female asked:
Dr. John Fung
Dr. John Fung answered
39 years experience General Surgery
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 ... Read More
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2 thanks

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