Table 1.

Histologic and Immunophenotypic Findings

Study	Results
Original diagnostic findings
Histology	90% monoblasts on bone marrow biopsy
Histochemistry	Myeloperoxidase positive
Flow cytometry	Positive for CD4, CD14, CD64, CD36; partial positivity for CD13, CD15, CD33, HLA-DR, and MPO
Cytogenetics	t(11;19)(q23;p13) detected; negative for t(9;22), t(4;11), and inv16
Diagnostic findings at the time of “recurrence”
Histology	Blasts with large nuclei with 1–3 nucleoli; occasional cytoplasmic granules; no Auer rods
Flow cytometry	Positive for CD13, CD33, CD117, CD34, HLA-DR, CD4, CD7, CD38, and CD71
Cytogenetics	Monosomy 7; negative for 11q23 translocation