CEACAM5 and gastric cancer: What’s more, ROC curve analysis revealed that the diagnostic value of tRF-17-18VBY9M after combing with CEA, CA199 and CA724 was markedly higher than the diagnostic potency of CEA, CA199 and CA724 alone, which indicated that tRF-17-18VBY9M may be a biomarker for GC diagnosis and prognosis.