Additionally, the leukemic blasts in B-lymphoblastic leukemia/lymphoma concordantly express CD123 and CD34 in the majority of cases and are double negative for these markers in a minority of cases, which can be used to distinguish them from hematogones, which typically display discordant expressions of these two markers: early hematogones are typically CD34+/CD123− and late hematogones are typically CD34−/CD123+ [16,17]. This evidence concerns the gene CD34 and lymphoma.