ABCC4 and acute lymphoblastic leukemia: We have identified SNP rs2274407 (G912T; K304N) located in the 3′ splice acceptor site of exon 8 of ATP-binding cassette subfamily C member 4 (ABCC4 or MRP4) pre-mRNA and ABCC4 G912T allele carriers (G/T and T/T genotypes), which are correlated with worse 3-DFS in pediatric BCP-ALL.