Blasts shown with monocytic features and abnormal eosinophils with mixed granules. This subtype is often associated with inv(16)(p13;q22) and an excellent prognosis, despite an increased incidence of central nervous system leukemia.^[1,3]

Scatter characteristics of a leukemic cell population from a patient with inv(16).

This fluorescence contour plot shows double staining of leukemic blast cells from a patient with inv(16) for the myeloid CD33 antigen and the T-cell associated CD2 antigen. The CD2 antibody is conjugated to fluorescein isothiocyanate (FITC) fluorochrome, the CD33 antibody is conjugated to the phycoerythrin (PE) fluorochrome.^[1,3]