Half full stated: "What is the common denominator? Answer is :"the patient may have cancer somewhere" That would be a good thing to know...."
No, they may or not have cancer. RECAF has false positives and CEA can indicate positive for inflamation or benign conditions. This combination provides no more information that giving a CEA test after a positive RECAF test in an attempt to locate the source of a positive RECAF test. You could do that anyway and this in no way screens for colon cancer.
Both of the posters at the ISOBM appear to be crafted not for the consumption of the scientific world but for the consumption of the more naive investor.
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