Polymerase chain reaction (PCR) and Sanger sequencing data from T‐ALL (n = 49, JNU) and targeted sequencing data from T‐ALL (n = 54, NFH) in our clinical center and a publicly available dataset (n = 121, PRJCA002270), were used to detect TNFAIP3 mutation. The gene discussed is TNFAIP3; the disease is acute lymphoblastic leukemia.