The cell indicated by the arrow is a blast. The other three cells are young monocytes. The cell just to the left of the blast has an indented nucleus. The cell on the lower right has a fold across the nucleus and the cell on the top right has a folded-over area in the nucleus resembling a cloth sack that is too big for its contents. It is only of academic interest that we recognize these cells as young monocytes instead of blasts, as the severity of acute monocytic leukemia is not correlated with the age of the cells.
Course Section: 04. Immature Cells in the Granulocytic - Monocytic - and Lymphocytic Series
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