Fig. 2

Bivariate dot plots of the flow cytometric analysis of the bone marrow aspirate. The color codes for the different cell subsets are as follows: green for granulocytes, blue for monocytes, purple for CD34 positive precursors, yellow for lymphocytes, and dark blue for erythroid precursors. Dot plot a and b show normal light scatter signals and normal expression of CD45 of all cell populations. No increase of CD34/CD117 positive cells was demonstrated as can be seen in dot plot c. Dot plot d shows partial loss of CD13 expression on monocytes as well as on granulocytes and shift to immaturity of the granulocytes of which the majority were negative for CD11b. The aberrant expression of CD56 by granulocytes and monocytes is demonstrated in dot plot e. Immature granulocytes were positive for CD4 as shown in dot plot f