Abstract
We recently reported the results from a multi-institutional retrospective outcome study involving 814 patients with renal cell carcinomas (RCCs) who had undergone radical surgery and whose diagnoses were confirmed via a central pathological review. This study aimed to clarify the impact of tumor size on survival outcomes in patients with pT3aN0M0 RCC after radical nephrectomy using this cohort. Using the Kaplan-Meier method, overall survival (OS), cancer-specific survival (CSS) and relapse-free survival (RFS) were estimated for 103 pT3aN0M0 patients. The differences in the OS, CSS and RFS according to tumor size were evaluated using the log-rank test. To identify independent prognostic factors that affected each survival outcome, clinicopathological factors were examined using univariate and multivariate analyses, and the Cox proportional hazards model. The OS, CSS and RFS rates for 26 patients with pT3a RCCs ≤4 cm were significantly better than those for 77 patients with pT3a RCCs that were 4-7 cm or >7 cm (P = 0.0064, 0.0169 and 0.0001, respectively). Tumor size and venous invasion were independent prognosticators for OS, CSS and RFS. The OS and CSS for patients with pT3a tumors ≤4 cm were comparable with those for patients w...Continue Reading
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