Table 1 summarizes the relationships between p-PKR or p-eIF2α expression and other clinicopathologic features. High p-PKR expression was associated with the adenocarcinomas subtype (p<0.001). No correlation was observed between p-PKR expression and gender sex, TNM stage, or smoking status. We also found no correlation between p-eIF2α expression and clinicopathologic features. Representative images of immunohistochemical staining results for p-PKR and p-eIF2α are shown in Figure 2. This evidence concerns the gene EIF2A and adenocarcinoma.