Comparing Tumor Markers for Colorectal Cancer Diagnosis
Author Information
Author(s): Y.T. van der Schouw, A.L.M. Verbeek, Th. Wobbes, M.F.G. Segers, C.M.G. Thomas
Primary Institution: University Hospital Nijmegen
Hypothesis
What is the diagnostic power of four serum tumor markers (CEA, CA 19-9, CA 50, and CA 195) in detecting colorectal carcinoma?
Conclusion
The study found that the newer tumor markers CA 19-9, CA 50, and CA 195 have low diagnostic power for colorectal cancer compared to CEA.
Supporting Evidence
- The cumulative frequency distributions showed strong overlap between malignant and benign groups for all markers.
- ROC curves indicated low diagnostic ability with AUC values of 0.65 for CA 19-9, CA 50, and CA 195, and 0.70 for CEA.
- None of the tumor markers had prognostic value for recurrence of disease.
Takeaway
Doctors tested four blood markers to see if they could help find colorectal cancer, but they didn't work very well.
Methodology
Preoperative serum concentrations of four markers were determined in 198 colorectal cancer patients and 57 patients with benign colorectal disorders.
Limitations
The study's findings may not apply to all populations, as about 10% of people cannot produce some of the markers due to genetic factors.
Participant Demographics
198 colorectal cancer patients and 57 patients with benign colorectal disorders.
Statistical Information
Confidence Interval
0.58-0.73 for CA 19-9, CA 50, and CA 195; 0.63-0.77 for CEA.
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