Although the carriers of GSTO1*C/A*C/C genotype exhibited an increased risk for testicular GCT development (OR1 = 2.14, Table 2) in comparison with the carriers of the referent genotype GSTO1*A/A, statistically significant association with increased risk of testicular GCT was observed in Model 2 (OR2 = 3.20; 95% CI: 1.1–9.35; p = 0.033; Table 2). The gene discussed is GSTO1; the disease is granular cell tumor.