The scatter plot of CDK1 expression in multifarious ESCC cell lines (KYSE450, TE10, TE6, TE4, ECGI10, TE14, TE8, OE33, KYSE410, KYSE140, KYSE180, TE9, KYSE520, KYSE270, TT, KYSE70, TE11, TE1, TE5, TE15, OE19, KYSE510, KYSE30, KYSE150, JHESOAD1, COLO680N, OE21) revealed that the expression of CDK1 was at a high level. This evidence concerns the gene CDK1 and esophageal squamous cell carcinoma.