ABCC2 and neoplasm: We found significant differences in the distribution of the ABCC2 genotypes between men and women in the subgroup of patients with right side tumor (rs1885301 G > A p = 0.0076 and rs4148386 A > G p = 0.0056 for ABCC2, respectively), while such a differences were not detected in the subgroup of patients with left side tumor (rs1885301 G > A p = 0.2393 and rs4148386 A > G p = 0.0668, respectively).