THBS2 and gastric cancer: TSP2 expression did not affect the prognosis of GC patients in the N0 subgroup (HR = 1.67, 95% CI: 0.73–3.83, P = 0.22) but significantly affected the prognosis of GC patients in the N(1 + 2 + 3) subgroup (HR = 2.36, 95% CI: 1.81–3.09, P < 0.01).