Comparison of CA 19-9 and CEA Levels in Colorectal Diseases
Author Information
Author(s): P. Kuusela, H. Jalanko, P. Roberts, P. Sipponen, J.-P. Mecklin, R. Pitkanen, O. Makelal
Primary Institution: University of Helsinki
Hypothesis
How do CA 19-9 and CEA levels compare in patients with colorectal diseases?
Conclusion
The CA 19-9 test is more specific but less sensitive than the CEA test for detecting colorectal cancer.
Supporting Evidence
- CA 19-9 was elevated in 46% of patients with advanced carcinoma.
- The sensitivity of the CA 19-9 test was 36%, while CEA's was 69%.
- CA 19-9 showed a specificity of 97%, compared to CEA's 70%.
- Only 4% of localized carcinoma patients had elevated CA 19-9 levels.
Takeaway
Doctors checked two blood tests to see if they could find cancer in people's tummies. One test was better at saying if someone had cancer, but the other test was better at not saying someone had cancer when they didn't.
Methodology
The study measured CA 19-9 and CEA levels in serum samples from 111 patients with colorectal cancer and 37 patients with benign colorectal diseases.
Limitations
The sensitivity of the CA 19-9 test was low, and the study did not include operated carcinoma patients without signs of relapse.
Participant Demographics
Patients included 111 with colorectal carcinoma and 37 with benign colorectal diseases, with various stages of cancer represented.
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