CTLA4 and acute lymphoblastic leukemia: Gene enrichment analyses identified key genes, including CDK1, CCNA2, MKI67, TOP2A, FOXM1, EXO1, KIF11, CHEK1, BUB1B, BUB1, GZMA, IL7R, GZMK, CCL5, CCR7, PRF1, TIGIT, CTLA4, KLRB1, and KLRD1 which may modulate T-ALL pathogenesis.