NECTIN2 and precursor B-cell acute lymphoblastic leukemia: The relative fold change in PVRL2 mRNA expression was slightly higher in B-ALL patients compared to controls (1.5 ± 0.54 vs. 1.02 ± 0.44, p = 0.043), as shown in Fig. 4, suggesting a possible role of PVRL2 in suppressing immune responses.