Using the t-distributed stochastic neighbor embedding (t-SNE) methodology, we examined the immunological phenotype of HSPCs based on the differential expression of CD34, CD38, CD45RA, CD123 and programmed death ligand 1 (PD-L1) antigens, and contrasted it with the immunophenotype of blasts and LSCs in AML and MDS. The gene discussed is CD34; the disease is acute myeloid leukemia.