TLR2 and keratoconus: The immunohistochemical results (Fig. 5; Table 2) showed that TLR2 was localized on the cell membrane of the colorectal epithelium in the NC group and of the colorectal tumors in the NT group, and the positive rates of the NT group (72.63% ± 4.20%) and NC group (56.57% ± 5.64%) were higher than those of the KC group (4.73% ± 0.82%) and the KT group (5.10% ± 0.65%), while the positive rate of the NT group was higher than that of the NC group (P < 0.001).