Flow cytometric profiles of CD38 expression on 3 CD5⁺CD19⁺ B-CLL cases.

B-CLL cases were analyzed by flow cytometry after exposure to anti-CD19–APC, anti-CD5–FITC, and anti-CD38–PE. The events represented were obtained by gating on cells expressing CD19. The variable percentages of CD5⁺CD38⁺ cells are reported on the upper-right quadrant region of each dot-plot.