In STAD, markers of monocyte (CD86, CSF1R), TAM (CCL2, IL10), M1 macrophage (IRF5, PTGS2), and M2 macrophage (CD163, VSIG4, MS4A4A) were closely correlated with KLHL5 (P < 0.0001; Figures 4A–H), which was also corroborated by GEPIA (Table 3) later. Here, PTGS2 is linked to gastric adenocarcinoma.