Two articles mentioned tumor markers, carcinoembryonic antigen (CEA) and squamous cell carcinoma antigen (SCC-Ag).[24,30] In a total of 138 patients, both indicators were significantly lower in the experimental group than in the control group after receiving Xihuang Pills/Capsules treatment (CEA, MD = –2.14, 95% CI: –2.28 to 2.20, P < .00001; SCC-Ag, MD = –2.52, 95% CI: –3.84 to 1.91, P = .0002). Here, CEACAM5 is linked to neoplasm.