Page 68 - Clinical Hematology Atlas

52 SECTION TWO HEMATOPOIESIS

NEUTROPHILIC METAMYELOCYTE

Cytoplasm

Nucleus
B
FIGURE 5–8B Schematic of metamyelocyte.
Dotted line indicates hypothetical round nucleus.
A
FIGURE 5–8A Neutrophilic metamyelocyte.

SIZE: 10-15 mm
NUCLEUS: Indented; kidney bean shape; indentation
is less than 50% of the width of a hypothetical
round nucleus
Nucleoli: Not visible
Chromatin: Moderately clumped
CYTOPLASM: Pale pink to cream colored to colorless
Granules:
Primary: Few
Secondary: Many (full complement)
N/C RATIO: 1.5:1
REFERENCE INTERVAL:
Bone Marrow: 13% to 22%
Peripheral Blood: 0%

See Figure 7-4 for eosinophilic metamyelocyte.
C
FIGURE 5–8C Electron micrograph of
metamyelocyte (322,250).