ABCC2 and colonic neoplasm: ABCC2 rs717620 (C-24T) CC genotype present increased rate of grade 3-4 thrombocytopenia in contrast to CT and TT genotypes in 292 colon cancer patients treated with FOLFOX chemotherapy (5.6% vs. 0.8%, p = 0.047) (Lee et al., 2013).