Page 93 - Clinical Hematology Atlas

CHAPTER 7 EOSINOPHIL MATURATION 77

EOSINOPHIL

A B
FIGURE 7–8A Eosinophil. FIGURE 7–8B Fractured eosinophil.

SIZE: 12-17 mm
NUCLEUS: 2-5 lobes connected by thin filaments
without visible chromatin; majority of mature
cells have 2-3 lobes
Nucleoli: Not visible
Chromatin: Coarse, clumped
CYTOPLASM: Cream-colored; may have irregular
borders
Granules:
Primary: Rare
Secondary: Abundant pale orange to dark
orange; round
N/C RATIO: Cytoplasm predominates
REFERENCE INTERVAL:
Bone Marrow: 0% to 3%
Peripheral Blood: 0% to 5%

Refer to Table 1-1 for more examples.

NOTE: Eosinophils are fragile and may easily
fracture when preparing blood film.