In 272 overall RCCs, age (CSS, P = 0.018), tumor stage (CSS, P = 0.005; RFS, P < 0.001), tumor necrosis (CSS, P = 0.005; RFS, P = 0.015), and IL13Rα2 expression (CSS, P = 0.025; RFS, P = 0.004) were significantly associated with CSS or RFS (Table 3). The gene discussed is IL13RA2; the disease is neoplasm.