In addition, we performed a Kaplan-Meier test for EP3 positive (IRS ≥ 1.5) squamous cell carcinoma and adenocarcinomas versus their EP3 negative ones and were able to show that EP3 expression in squamous carcinoma patients is significant with poor survival (p = 0.003; Figure 2C). This evidence concerns the gene PTGER3 and squamous cell carcinoma.