CHEK1 and cancer: According to the results of TIMER database, we observed that CHK1 were significantly associated with the immune infiltration in various cancers including ACC, BRCA, BRCA-Luminal, CHOL, COAD, KIRC, LGG, LIHC, LUAD, MESO, PAAD, PCPG, STAD, TGCT, THCA, THYM and UCEC, etc., suggesting the predictive role of CHK1 in the immune status of multiple cancers.