The blasts appear undifferentiated. One of the four shows some granules. | The cells are positive for CD33 CD13 as well as for cytoplasmic CD3 and other T cell markers (W.-D. Ludwig) | Again a blast with some granules. |
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Some of the larger blasts are positive for peroxidase. | Even the small blast in the middle shows positivity for peroxidase | Sometimes peroxidase positivity is as faint as in the cells near the top. |
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CD13: 95%, CD33 73%, 3cyto 88%, CD5 94%, CD2 92%, CD7 92% TdT 90% (W.-D. Ludwig) | Even some Auer rods could be found. |
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