IMPA2 and nonpapillary renal cell carcinoma: In addition, the Chi-square test showed that the signature that combines low-level IMPA2 and autophagy gene set expression is extensively detected in ccRCC derived from male patients who are classified as having higher pathologic T status (T3 and T4), pathologic M1, higher pathologic stage (III and IV) or higher neoplasm grade (G3 and G4) (Figure 6F).