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X.A.001 Normal Marrow Cells

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X.A.001

Normal marrow cells. Peroxidase stain. (A) Large promyelocyte stains intensely (blue-black color) because of the abundant primary granules in cytoplasm (asterisk). Myelocytes and segmented neutrophil also stain but less intensely because of the decreasing concentration of primary granules.

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X.A.002 Acute Myelogenous Leukemia

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X.A.002

Acute myelogenous leukemia. Peroxidase stain. Marrow films. Left panel: note positive stain for cytoplasmic granules and Auer rod in each of two blast cells. Right panel: peroxidase stain and Wright-Giemsa stain. Note two peroxidase positive blast cells. The upper of two blast cells contains an Auer rod highlighted by the peroxidase stain.

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X.A.003 Acute Lymphocytic Leukemia

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X.A.003

Acute lymphocytic leukemia. Peroxidase stain. Note neutrophil reacts positively with peroxidase stain. The remaining leukemic lymphoblasts are not stained.

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