Figure 1. (A) Peripheral blood smear (admission period at the first hospital, with acute febrile illness) showing abnormal white blood cells with adequate platelet (Wright-Giemsa stain, original magnification ×1000). (B, C) Peripheral blood smear (admission period at the second hospital, with persistence fever and cytopenic condition) showing a small number of red blood cells with lymphoblastic cells and decreasing numbers of platelets (Wright-Giemsa stain, original magnification ×1000). (D, E) Bone marrow smear showing hypercellularity of marrow with predominately lymphoblastic cells (Wright-Giemsa stain, original magnification ×1000).