CEACAM5 and gastric cancer: ROC analysis showed that tRF-31-PNR8YP9LON4VD, tRF-30-MIF91SS2P4FI and tRF-30-IK9NJ4S2I7L7 had higher sensitivity and specificity and were superior to the conventional markers (CEA, CA199, and CA724) in the differential diagnosis of GC, particularly in the early stages of the disease.