The distribution of ZNF217-WT (E3-E4) and ZNF217-ΔE4 (E3-E5) mRNA levels in the primary breast tumors highlighted that the ZNF217-ΔE4 isoform mRNA expression levels are globally weaker than those of the ZNF217-WT isoform (Figures 1A, B). This evidence concerns the gene ZNF217 and breast neoplasm.