The stemness maintenance of breast CSCs via sponging the tumor suppressor let7 miRNA is one of the ceRNA activities of H19. In this line, Peng et al. found that H19 is overexpressed in breast cancer cells and, by acting as a ceRNA to inhibit the synthesis of miR-let7, promotes the expression of LIN28 mRNA. This evidence concerns the gene LIN28A and neoplasm.