Dong et al25 found that a combination of three circulating lncRNAs (CUDR, LSINCT‐5, and PTENP1) in serum had a significantly higher diagnostic value than did any single‐factor index, including CA19‐9 or CEA, reporting that the combination of three circulating lncRNAs yielded a new complementary marker for GC. This evidence concerns the gene PTENP1 and gastric cancer.