Page 81 - Clinical Hematology Atlas

CHAPTER 6 MONOCYTE MATURATION 65

MONOCYTE

Cytoplasm

Nucleus

Vacuoles
B
FIGURE 6–6B Schematic of monocyte.
A
FIGURE 6–6A Monocyte.

SIZE: 12-20 mm
NUCLEUS: Variable; may be round, horseshoe
shaped, or kidney shaped; often has folds
producing “brainlike” convolutions
Nucleoli: Not visible
Chromatin: Lacy
CYTOPLASM: Blue-gray; may have pseudopods
Granules: Many fine granules frequently giving the
appearance of ground glass
Vacuoles: Absent to numerous
N/C RATIO: Variable
REFERENCE INTERVAL:
Bone Marrow: 2%
Peripheral Blood: 3% to 11%
C
Refer to Table 1-1 for more examples.
FIGURE 6–6C Electron micrograph of
monocyte (316,500). Specimens for electron
microscopy are prepared by embedding tissue in
a suitable medium, such as resin. Ultra-thin cross-
sections are then prepared. Because this image
shows a cross-section, the lobes of the nucleus
appear to be separate, but they are not.