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• W2082922245 abstract "See accompanying articles by Kawaguchi, Shimura and colleagues on pages 313 and 321.Serum tumor markers can have several roles in many aspects of cancer management including early detection or diagnostic confirmation of cancers, predicting prognosis and/or response of specific treatment, and disease monitoring after primary treatment. Because the most of tumor markers have showed variable sensitivity and specificity in various conditions of specific cancers, there has been no ideal tumor marker in current clinical practice in oncology and squamous cell carcinoma antigen (SCC-Ag) in squamous cell carcinoma of cervix (SCC) is not exceptional. Since SCC-Ag, which can be produced through squamous formation of the uterine cervix and increased during the neoplastic transformation of the cervical squamous epithelium, was discovered in 1997 [1,2], many researches have been performed to investigate the role of serum SCC-Ag in SCC. However the clinical implementation of serum SCC-Ag is still controversial.Serum SCC-Ag levels are elevated in 28%-88% of patients with SCC [3]. In early stage of SCC, higher levels of serum SCC-Ag is associated with the pathological risk factors for recurrence such as lymph node metastasis, deep stromal tumor invasion, lymph-vascular space invasion, and larger size of primary tumor in cervix. For example, the positive predictive value for lymph node metastases at >2, >4, and >8.6 ng/mL SCC-Ag is 51.4%, 70.0%, and 100% but the level of SCC-Ag itself was not an independent risk factor for recurrence [4]. On the contrary SCC-Ag level before treatment was reported to be independent risk factors for disease free survival and/or overall survival at multivariate analysis in other studies [5,6]. In a cohort study of 337 patients with IB1-IIA who were surgically treated, it was suggested that serum SCC-Ag level before surgery allows more refined preoperative estimation of the likelihood for adjuvant radiotherapy than pathological risk factors for recurrence representing clinical relevance of serum SCC-Ag in early stage SCC [7].In locally advanced SCC, pre- and postradiotherapy serum SCC-Ag levels showed the prognostic significance. Hong et al. reported that pretreatment SCC-Ag levels higher than 10 ng/mL are an independent predictor for poor prognosis and persistently elevated SCC-Ag level at 2-3 months after radiotherapy had a significantly higher incidence of treatment failure in their large cohort [8]. In a Japanese study, the SCC-Ag level cut-off point for three-year overall survival rates, calculated using a receiver operating characteristic curve, was 1.15 ng/mL with the sensitivity of 80.0% and specificity of 74.0% [9]. In a retrospective study of 788 patients with SCC, clinical significance as a prognostic marker for progression free and/or overall survival was higher in locally advanced SCC than in early stage SCC [10].Increasing serum SCC-Ag can precede the clinical diagnosis of relapse in 46%-92% of cases, with a median lead time ranging from 2 to 8 months [3]. However, there is still no strong evidence that the earlier intervention due to early detection of relapse is associated with better survival in recurrent SCC. In a previous study, serum SCC-Ag analysis results in earlier recurrence detection in a small proportion (14%) of patients but did not contribute to better survival [11]. On the other hand, another study reported that salvage treatment with radiotherapy or surgery resulted in improved survival compared with chemotherapy or palliative care in patients with serum SCC-Ag levels of less than <14.0 ng/mL at the time of recurrence [12].With the limitation of serum SCC-Ag as an ideal biomarker for SCC, other biomarkers such as CYFRA 21-1, immunosuppressive acidic protein, and vascular endothelial growth factor in patients' serum have been investigated but the results were modest or are still investigating [13]. And more recently there have been developments in the use of molecular imaging technology in oncological applications and the use of magnetic resonance imaging or positron emission tomography with or without combination of biomarkers in the management of cervical cancer [14].In conclusion, serum SCC-Ag is a commonly used and may be the most promising biomarkers in patients with SCC until now. However, clinical relevance of serum SCC-Ag in SCC is still on debate and there should be more researches investigating the clinical application of SCC-Ag and developing new biomarkers in SCC in the future." @default.
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• W2082922245 date "2013-01-01" @default.
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• W2082922245 title "Squamous cell carcinoma antigen in cervical cancer and beyond" @default.
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• W2082922245 doi "https://doi.org/10.3802/jgo.2013.24.4.291" @default.
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