PTENP1 and neoplasm: PTENP1 exerts its tumor‐suppressive function primarily by competitively binding a panel of oncogenic microRNAs, including miR‐17, miR‐19, miR‐21, miR‐26, miR‐214, and so on, that normally target PTEN mRNA for degradation, thereby acting as a molecular sponge that protects PTEN transcripts from microRNA‐mediated suppression [14].