The Role of Serum CEA and CA19-9 in Efficacy Evaluations and Progression-Free Survival Predictions for Patients Treated with Cetuximab Combined with FOLFOX4 or FOLFIRI as a First-Line Treatment for Advanced Colorectal Cancer

Disease Markers
Jun JiaGuanghai Dai

Abstract

Previously, it was demonstrated that serum levels of tumor markers, CEA and CA19-9, correlated with chemotherapy. Consequently, it has been hypothesized that dynamic monitoring of changes in these markers may predict the shrinkage or growth of colorectal cancers. To test this hypothesis, we analyzed CEA and CA19-9 serum levels in patients with advanced colorectal cancer who received cetuximab in combination with chemotherapy. These levels were evaluated at various time points to identify their potential to serve as early efficacy predictors during treatment and early predictors of disease progression. Measurements of tumor markers, CEA and CA 19-9, in patients with metastatic colorectal cancer (n = 73) who received cetuximab plus folinic acid, fluorouracil, and oxaliplatin or irinotecan (FOLFOX4/FOLFIRI) as a first-line treatment at our center were retrospectively analyzed. These levels were also compared with objective responses according to the World Health Organization criteria. Initially, 65 patients had elevated CEA levels (>5 ng/ml), and 59 patients had elevated levels of CA19-9 (>37 U/ml). A total of 172 cycles and 165 cycles of computed tomography/magnetic resonance imaging observations were available for review from th...Continue Reading

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