Flow cytometry histograms of a marrow specimen with increased hematogones.

The histograms illustrate the normal pattern of maturation of B-lymphocyte precursors (hematogones) with the 4-color antibody combination of CD10, CD20, CD19, and CD38. The CD10-CD20 histogram was similar to the one illustrated in Figure 3. Violet indicates early-stage hematogones; green, intermediate and late-stage hematogones; blue, mature B cells.