At last, 10 case-control studies [14], [15], [16], [17], [18], [19], [20], [21], including 4619 cancer cases and 4661 controls, assessing the association between −842(G>C) polymorphism of PIN1 and cancer risk, published between 2007 and 2013 were included in the meta-analysis (Baseline data and other details are shown in Table 1). This evidence concerns the gene PIN1 and cancer.