Bone marrow findings showing both features of plasma cell myeloma and myelodysplastic syndrome. The arrows indicate megakaryocytes with separated (A) and hypolobulated nuclei (B, C), and erythroblasts with binucleation (C, lower side) and delayed mitosis (D), respectively. Bone marrow biopsy revealed diffuse infiltration of plasma cells (E) that were CD138 positive (F).