Role of excision repair cross-complementation 1 expression as a prognostic marker for response to radiotherapy in early-stage laryngeal cancer

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Background.High expression of excision repair cross-complementation 1 (ERCC1) predicts for resistance to platinum-based chemotherapy or chemoradiotherapy. We evaluated the prognostic value of ERCC1 expression in a cohort of laryngeal cancer treated with radiotherapy alone.Methods.ERCC1 expression was examined by immunohistochemical analysis of tissue microarrays constructed from 123 patients with stages I–II laryngeal squamous cell carcinoma treated with standard radiotherapy.Results.ERCC1 expression did not correlate with clinicopathologic risk factors, local control, or overall survival. At 5 years, local control was 75% versus 71% (p= .78) and overall survival was 68% versus 54% (p= .65), for nonexpressors and expressors of ERCC1, respectively. On multivariate analysis, T classification predicted for local control, and T classification and age predicted for overall survival.Conclusions.ERCC1 expression did not predict for radiotherapy resistance or worse survival. Therefore, radiotherapy remains an effective treatment in tumors with high ERCC1 expression.

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