Small :
20-25% of leukocytes
diameter 6-8 µm
nucleus spheroid or ovoid
chromatin in dense lumps
cytoplasm scarce and stained pale blue
Medium :
1.5-2.0% of leukocytes
diameter 8-12 µm
chromatin less dense
more cytoplasm & tend to surround more of nucleus
Polymorph:
60-70% of leukocytes
diameter 10-12 µm
nucleus 2-8 lobes
chromatin in dense coarse lumps
cytoplasm is acidophilic with neutrophilic granules
'drumstick' on lobe in 3% of neutrophils in females
Band Neutrophil:
1-2% of neutrophils
horse-shoe shaped nucleus
cytoplasm has granules
3-8% of leukocytes
largest leukocyte (20 µm)
nucleus indented and pale
cytoplasm abundant and basophilic, non-uniform (foamy) appearance
cytoplasm may contain a few fine azurophilic granules
up to 5% of leukocytes
diameter 12-15 µm
nucleus less lobed, usually only bilobed
chromatin clumped but not as dense as in neutrophil
cytoplasm filled with numerous large eosinophilic (acidophilic) granules which stain pale-pink.
less than 1% of leukocytes
diameter 14 µm
nucleus large and bilobed
chromatin is more finely textured so nucleus is more pale staining
cytoplasm filled with large dark-blue staining granules (basophilic) which may obscure nucleus (Blackberry appearance)