not-yet-known not-yet-known not-yet-known unknown Figure Legend: Figure 1: A, Peripheral blood smear of the first patient shows a mild increase in blasts and monocytosis (Wright Giemsa Stain, 1000x).B, hypercellular marrow with myeloid predominance (Hematoxylin and eosin stain, 200x). The concurrent flow cytometry detected 15% myeloid blasts (not shown). C, the bone marrow aspirate smear of the second patient shows rare blasts and monocytosis (Wright Giemsa Stain, 1000x). D, hypercellular marrow with myeloid predominance (Hematoxylin and eosin stain, 200x). E and F, CD34 and CD117 immunostains highlight scattered blasts.