GSTO2 and granular cell tumor: As the distribution of the GSTO2*A424G (rs156697) genotypes differed from the whole group of testicular GCT patients, the association of the GSTO2rs156697*A/G*G/G genotype did reach statistical significance in Model 1 (OR1 = 2.24; 95% CI: 1.09–4.60; p = 0.028; Supplementary Table S1).