The cell shown here is a blast. It was observed on a slide of a patient with acute monocytic leukemia. The one distinctive feature of this cell that differentiates it from a myeloblast is the indented area of the nucleus, indicated by the arrow. This indented nuclear area is typical of monocytes and is one way of identifying them. It is unfortunate that all monocytes do not have this sign.
Course Section: 04. Immature Cells in the Granulocytic - Monocytic - and Lymphocytic Series
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