The distribution of low vs. high PVR expressors was relatively equal in FAB type M2, M4 and M5, whereas it was significantly lower in AML M1 subgroup (Fisher’s exact test p = 0.01), while for PVRL2, no significant difference was observed in the various FAB subgroups (Fisher’s test p = 0.114; Supplemental Table S2). Here, PVR is linked to acute myeloid leukemia.