HNRNPK and posterior cortical atrophy: When we compared the expression of hnRNP K associated with the NM isolated from PCa with a Gleason score 4–6 with those from PCa with a Gleason score 7–9 the significance disappeared (P=0.1); however, if we separate Gleason 7 category group into two groups (3+4) and (4+3) according to primary differentiation pattern and compare the expression of hnRNP K in PCa with Gleason score 4–7(3+4) vs 7(4+3)–9 the difference becomes again statistically significant (P=0.017).