Several cells on this slide have a marked irregularity of the nucleus. The blood was obtained from a patient with acute myelomonocytic leukemia. The cell indicated by the arrow is slightly different from the other cells because the nuclear chromatin is not as homogeneous and the cytoplasm is slightly pink. Because of these features, this cell is probably a promyelocyte. It could be a promonocyte also. It is nearly as difficult to tell promyelocytes from promonocytes as it is to tell blasts apart.
Course Section: 04. Immature Cells in the Granulocytic - Monocytic - and Lymphocytic Series
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