(A) Overiew of CD3D transcriptional levels in ONCOMINE database. (B) Meta-analysis of CD3D based on 10 studies in ONCOMINE database. (C) CD3D expression level between normal and tumor sample in GEPIA database. (D) CD3D expression level between normal and tumor sample based on TCGA gene expression data. (E) CD3D expression level between tumor tissues and paired tissues,* indicates that the mRNA expression between normal and tumor tissue is significantly different with P<0.05.