ARID1A and nonpapillary renal cell carcinoma: The study of ARID1A in 290 cases of ccRCC in Korea showed that lower ARID1A expression was associated with higher nuclear grade (p < 0.001), higher pTNM stage (p = 0.013), and shorter CSS (p = 0.001) and progression-free survival (p < 0.001) [45].