Flow cytometry of the PB: 6-10% abnormal cells positive for CD61, CD71, CD9, CD13(partial), CD117(p), CD4(p), CD7(p), CD45(dim); negative for CD34, HLA-DR, CD33, MPO, CD14, CD15, T-cell and B cell markers.
Immunohistochemical stains on BM bx:
Immunohistochemical stains on BM bx:
Diagnosis: Acute megakaryoblastic leukemia.