LncRNA LNMAT1 promotes bladder cancer metastasis through enhancing CCL2- dependent macrophage recruitment11; LncRNA MFI2-AS1 facilitates cell migration and invasion via acting as the ceRNA of miR-574 to regulate MYCBP in CRC12; HOXD-AS1 represses CRC growth and metastasis through suppressing HOXD3-activated integrin β3 transcription and MAPK/AKT pathway13. Here, PTGDR is linked to urinary bladder carcinoma.