The gene ranking according to GeNorm indicates that TBP is the gene with the most stable expression for adult ALL and AML patients, with stability values of 0.098 and 0.073, respectively, and HPRT is the gene with the most stable expression for both pediatric ALL patients and normal samples, with a stability value of 0.059 and 0.040, respectively (Table 3). Here, HPRT1 is linked to acute lymphoblastic leukemia.