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False Positives and False Negatives ... The following factors are known to lead to false positive or false negative results in tumor marker blood tests. ... Tobacco use can lead to elevated CEA levels. (CEA is elevated in 19% of smokers and only 3% of the non-smoking healthy population.)


Has anyone ever been told that their CEA level was a false positive? i'm so nervous as my last CEA was much higher than my original diagnosis. I've been cancer free since Sept. 2016. I had a blood test in August which showed the high CEA, followed by a clear CT scan of the chest, abdomen, pelvis area.


When used along with imaging studies and other tests, it can be helpful in planning and monitoring treatment. The test has limitations in that not all cancers (especially early stage cancers) have elevated levels, and false positives may occur, as many benign conditions may cause elevations in CEA.


False-positive CEA test results in the range of 5 to 15 ng/mL are common. Confirmation of CEA elevation in this range prior to initiating imaging studies may be appropriate. False-positive CEA test results greater than 15 ng/mL are rare, and all confirmed CEAs greater than 35 ng/mL were associated with cancer recurrence.


No confirmed CEA elevation of greater than 35.0 ng/mL was found to be a false‐positive result. “CEA elevations between 5 and 10 ng/mL are just as likely to be a false‐positive as a true‐positive, so a single bump in CEA to this range should not necessarily prompt additional scanning and should instead be repeated and then reconsidered ...


Is it possible to have a false positive on a CEA test when you have a active ecoli infection and multple Auto-immune diseases? History: My CEA test that came back 9.3 ng/ml and that combined with a Low Lymphocyte count of 12% and MCH 26.1, MCHC 31.2 and Hb 11, suffering symptoms of Fatgue, lower abdominal/palvic pain and Lower back pain with chronic UTI's and decreased GFR 39.


Carcinoembryonic antigen (CEA) has been shown to be associated with tumor burden in patients with colorectal cancer. However, it is also elevated to a significant degree in a number of other malignant and non-malignant conditions. We report a case of reversible CEA elevation in a patient using ...


Introduction: This information shows the various causes of Elevated CEA, and how common these diseases or conditions are in the general population.This is not a direct indication as to how commonly these diseases are the actual cause of Elevated CEA, but gives a relative idea as to how frequent these diseases are seen overall.. 1 disease that is "uncommon".

www.people.vcu.edu/~mhcrosthwait/clrs 417web/CEAlecture.htm

Despite these false negative and positive results CEA assay continues to play a significant role in predicting the presents of cancer as well as whether or not there is reoccurrence of cancer ; Elevated levels of CEA assay may result in the use of MRI or CT to diagnose the initial or reoccurrence of disease


Carcinoembryonic antigen (CEA) describes a set of highly related glycoproteins involved in cell adhesion. CEA is normally produced in gastrointestinal tissue during fetal development, but the production stops before birth. Consequently, CEA is usually present at very low levels in the blood of healthy adults (about 20 ng/mL).