For overall survival (OS), cancer-specific survival (CSS) and disease-free survival (DFS) gene expression was analyzed with Kaplan-Meier and Cox-proportional hazard models.<h4>Results</h4>Significant gene expression differences in <i>EGFR</i>, <i>AREG</i>, and <i>EREG</i> could be detected in all cohorts. The gene discussed is EREG; the disease is cancer.