Using subjects with the T-T-T haplotype of ABCB1 1236, 2677, and 3435 as a reference group, the C-G-C haplotype was associated with a decreased risk for NHL (OR = 0.83, p = 0.04) and DLBCL (OR = 0.77, p = 0.03), whereas the C-G-T haplotype was associated with an increased risk for NHL (OR = 1.67, p = 0.02) and T-cell lymphoma (OR = 2.48, p = 0.007). This evidence concerns the gene ABCB1 and diffuse large B-cell lymphoma.