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  • Title: A combination of serum tumor markers identifies high-risk patients with early-stage squamous cervical cancer.
    Author: Davelaar EM, van de Lande J, von Mensdorff-Pouilly S, Blankenstein MA, Verheijen RH, Kenemans P.
    Journal: Tumour Biol; 2008; 29(1):9-17. PubMed ID: 18497544.
    Abstract:
    We aimed to investigate whether pretreatment serum levels of squamous cell carcinoma (SCC) antigen (SCC-Ag), cytokeratin 19 (CYFRA 21-1) and two mucins (CA 15-3 and CA 125) identify patients with occult disease in early-stage SCC of the cervix. Therefore, pretreatment serum samples were obtained from 78 patients with SCC of the cervix (52 IB, 9 IIA and 18 IIB), and tumor markers were measured with commercial immunoassays. SCC-Ag, CYFRA 21-1 and CA 15-3 (analyzed as continuous variables) were significantly associated with overall (OS) and disease-free survival (DFS) in univariate analysis (p < 0.001 in all cases). Multivariate analysis identified lymph node status as the strongest predictor for OS and DFS (p < 0.001 and p = 0.001, respectively), followed by CYFRA 21-1 (p = 0.060 and p = 0.027, respectively) and CA 15-3 (p = 0.082 and p = 0.017, respectively). Clinical cutoff values for each marker were defined by maximizing the log-rank statistics for OS in the total population: 1.1 microg/l for SCC-Ag (n = 47, 60.3%), 1.4 microg/l for CYFRA 21-1 (n = 47, 60.3%), 40 U/ml for CA 15-3 (n = 11, 14.1%) and 30 U/ml for CA 125 (n = 10, 12.8%). Stage IB patients with positive SCC-Ag and CYFRA 21-1 had significantly lower OS (mean 8.3 years, 95% confidence interval, CI, 5.8-10.7 years) and DFS (mean 7.3 years, 95% CI 4.6-10 years) than all other stage IB patients (OS, mean 14.5 years, 95% CI 13.5-15.5 years; DFS, mean 13.9 years, 95% CI 12.5-15.4 years). Stage IB patients with tumors <4 cm or with negative lymph nodes and positive SCC-Ag and CYFRA 21-1 had significantly poorer OS and DFS compared to all other patients in the same group. Elevated levels of both CA 125 and CA 15-3 (3 patients) were associated with an extremely poor prognosis. In conclusion, a combination of SCC-Ag and CYFRA 21-1 may help to identify early-stage cervical cancer patients with occult disease requiring adjuvant therapy.
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