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  • Title: [The value of the guaiac test in the screening of colorectal tumors].
    Author: de Peyer R.
    Journal: Schweiz Med Wochenschr; 1986 Oct 04; 116(40):1381-4. PubMed ID: 3095919.
    Abstract:
    The sensitivity, specificity and positive predictive value of fecal blood testing are too poor to allow its general use as a screening test for colorectal cancers. Even the predictable qualitative improvement of these tests will be of no avail with regard to non-tumoral sources of bleeding or the non-hemorrhagic tumoral sources of bleeding or the non-hemorrhagic tumours which are frequent in the early stages of colorectal cancer. It is therefore essential to define high-risk groups, to pay particular attention even to minor symptoms, and to perform the necessary endoscopic or radiological diagnostic tests.
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