Kinetic analysis of CD7+/CD34+/− leukemic cell growth in vivo using immunohistochemistry did not allow early cell infiltration analysis but revealed higher late infiltration level for CD7+/CD34+-derived xenografts compared to CD7+/CD34−-derived leukemia (Figure 3E) in accordance with flow cytometry datas (Figure 1A). Here, CD34 is linked to leukemia.