Bone marrow biopsies (H&E) at 40x from screening (A) and C3D1 (B). Bone marrow aspirate (WG stain) at 100x from screening (C) and C3D1 (D). (A) Blasts (black arrows) occur in many small groups. Maturing myeloid cells (yellow arrows), erythroid precursors (red arrows) and megakaryocytes (blue arrows) are also present.