Bone marrow smear from a patient with acute myelomonocytic leukemia with increased marrow eosinophils (FAB classification M4EO) and an associated inv(16) chromosome abnormality. (Wright-Giemsa stain). The two eosinophilic precursors in this field (arrows) show prominent basophilic-staining granules.
From Brunning, RD, McKenna, RW. Tumors of the bone marrow. Atlas of tumor pathology (electronic fascicle), Third series, fascicle 9, 1994, Washington, DC. Armed Forces Institute of Pathology.