DUSP9 and nonpapillary renal cell carcinoma: Intense expression of DUSP-9 in ccRCC samples was correlated with gender (p = 0.031), pathologic stage (p = 0.001), Fuhrman grade (p = 0.002), tumor size (p = 0.001), T stage (p = 0.001), N classification (p = 0.012), metastasis (p = 0.005), and recurrence (p < 0.001), but it was not correlated with age.