Abstract
In spite of early detection, appoximately 15% of the small renal cell carcinomas (RCC) will develop metastasis within 5 years follow-up. The aim of this study was to identify new biomarkers to estimate the postoperative relapse of the most common conventional RCC. Tissue multi arrays of conventional RCC without metastasis at the time of operation from a cohort of 634 patients were analysed by immunohistochemistry for expression of the chitinase 3-like protein 2 (CHI3L2). Cancer specific survival of patients was estimated with Kaplan-Meier analysis, univariate and multivariate Cox regression models. Kaplan-Meier analysis estimated a shorter cancer-free survival for patients with CHI3L2 positive tumors. In multivariate analysis, the CHI3L2 positivity associated with a 3.5 times higher risk for tumor relapse (p<0.001). Expression of CHI3L2 in tumor cells of conventional RCC define a group of patients at high risk for postoperative progression.
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