EGFR and neoplasm: Furthermore, patients found genetically to have the EGFR CA repeat SS genotype and a tumor with EGFR protein overexpression had the worst prognosis in terms of both DFS (p = 0.002; HR = 4.11; 95% CI, 1.66–10.14) and OS (p = 0.01; HR = 3.25; 95% CI, 1.33–7.95) compared to those with either form of the L allele CA repeat genotype and/or no EGFR protein overexpression by their tumor (Table 4, Fig. 1).