TLR2 and gastric cancer: For example, it was reported that the TLR2 −196 to −174 del polymorphism was associated with risk of several cancers, such as cervical cancer, gastric cancer, breast cancer and hepatocellular cancer [21], [23], [24], [38], [41], but not associated with other cancers including bladder, prostate cancer and gallbladder cancer [19], [32], [40].