The chromatin is finely dispersed and homogenous looking. The promyelocyte will range in size from 16-24 microns, depending upon how recently it has divided. The myelocyte is larger than the metamyelocyte, but smaller than the promyelocyte. Nuclear chromatin is slightly clumpy, and the nucleus is elliptical in shape, often with a slight flattening or indentation. Both neutrophilic granules and the dense, dark purple-staining azurophilic granules are present.
Neutrophilic granules are evident.
Find examples of the mature neutrophil, eosinophil, and if possible, basophil. Examine these carefully to get a feeling for the color and appearance of the specific granules which characterize the mature forms of these cells. At the promyelocyte stage they are indistinguishable from the neutrophilic precursor. Look for them with the 10-40 X objective, not oil . Immature megakaryocytes are not easy to find, but easy to identify if you do.