KRT7 and colorectal carcinoma: The P-value for CK7 + /CK7 − was surprisingly low (P = 0.007); lower than in low/high grade (0.062) and right/left-sided tumors (P = 0.043); however, the association between CK7 + and high-grade CRC and the association between CK7 + and right-sided tumors was not significant.