Flow cytometric analysis peripheral blood cells from 4 representative CLL patients with unmutated IgHV, after CD34 selection: (A) del 13q, (B) del 11q, (C) del 17p, and (D) trisomy 12. The circles represent the CD34+CD19+ and CD34+CD19− populations and their % after the CD34 selection. The vertical and horizontal lines represent to CD19 and CD34 gates, respectively.