Figure 1
Diagnosis of acute megakaryoblastic leukemia. a. Bone marrow smear revealed many medium to large-size megakaryoblasts. The yellow arrow indicates megakaryoblasts (1000 ×). b. Bone marrow smear revealed many large-size promegakaryocytes. The cytoplasm of promegakaryocytes shows distinct pseudopod formation (1000 ×). The red arrow indicates the promegakaryocytes. c, d. Immunohistochemistry staining of CD41 (c) and CD42b (d) of bone marrow smears (1000 ×). The positivity was shown by the red precipitates in plasma or membrane. e. Bone marrow biopsy showing diffuse bone marrow infiltration of medium-size megakaryoblasts (1000 ×). The blue arrow indicates the megakaryoblasts. f. Bone marrow biopsy showing myelofibrosis (100 ×). The white arrow indicates myelofibrosis.