Figure 2.

Ten color multiparameter flow cytometry. (a-d) Flow cytometry performed on the peripheral blood at our institution shortly after (day 3) the diagnostic bone marrow was taken showing a CD34 positive blast population (3.7% of total white blood cells) with abnormal expression of CD117 (absent to dim), CD13 (absent), CD33 (mostly absent), and CD56 (subset). (e-h) Flow cytometry performed on the day 21 bone marrow aspirate showing a small abnormal blast population (orange, 0.08% of total white blood cells) with a similar immunophenotype to those seen in the peripheral blood on day 3. (i-l) Flow cytometry performed on the day 49 bone marrow aspirate showing no abnormal myeloid blast population.