CCNE1 and neoplasm: To explore the involvement of CCNE1 in immune infiltration and the role of this process in the initiation, progression and metastasis of tumor development, we used TIMER2, EPIC, MCPCOUNTER, CIBERSORT, CIBERSORT-ABS, QUANTISEQ, XCELL, naive_XCELL, central memory_XCELL, and effector memory_XCELL algorithms to analyze the correlation between immune cell infiltration and CCNE1 differential expression in TCGA.