Objective:Esophageal carcinoma is the eighth most common malignant tumor and ranked the sixth cause of death in the worldwide careinoma.To find out effective serum markers for early diagnosis and targeted treatment is important to improve esophageal carcinoma survival rate.The aim of this study was to screen differ-entially expressed serum protein profiling in esophageal squamous cell careinoma(ESCC)patients with differ-ent Chinese medicine syndrome and establish ESCC syndrome diagnosis model,to explore the signifcance of ESCC serum differential protein in traditional Chinese medicine(TCM)syndrome diagnosis and provide exper-imental and theoretical basis for the diagnosis,clinical treatment of ESCC.Methods:Serum specimens of 80 ES-CC patients with different syndrome and 20 healthy people were selected according to distribution of their sex and age.Magnetic beads based weak cation exchange combined w ith matrix-assist ed laser desorption/ionization time-of-flight mass spectrometry prot eomic technology and Autoflex Analysis and ClinProTools software were applied to screen differentially expressed serum protein profiling.Then establishing each syndrome group diag-nosis model and verifying with new samples to evaluate the diagnosis value of each syndrome group diagnosis model.Results:18 significantly differential expression protein peaks were screened between the whole ESCC patients sera and the healthy control group.Compared with normal control group,among which,ten were signif-cant down-regulation with m/z values of4210,4267,4054,4248,2106,4091,2991,5337,3952,822,and eight were significant up-regulation with m/z values of 2900,2883,1467,1617,2862,2600,895,811.There were 16,12,11,15 differentially expressed protein peaks in phlegm and qi stagnat ion syndrome(Group P),fluid insufficiency and heat agglomeration syndrome(Group F),blood stasis syndrome(Group B),qi and yang deficiency syndrome(Group Q),respectively.Protein with m/z of4210,4091,4054 and 5337 presen-ted obviously low expression in all syndrome groups,whil
