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Flow cytometry of acute undifferentiated leukemia case showing blast population (red) positive for CD45 (a), negative for lineage-specific antigen (b, c, d), negative for T-cell markers (e, f), positive for CD7 (g, h), positive for primitive markers, which are CD34, HLA-DR, and CD38, and negative for CD117 (i, j, k), positive for only one myeloid marker CD33 (l), and negative for all other markers (m, n, o, p, q, r, s, t). HLA-DR: human leukocyte antigen-DR isotype.
