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CHAPTER 4 MEGAKARYOCYTE MATURATION 37
PROMEGAKARYOCYTE (MK-II)
Cytoplasm
Nucleus
A B
FIGURE 4–4A Promegakaryocyte, MK-II—bone FIGURE 4–4B Promegakaryocyte, schematic.
marrow (31000).
SIZE: 15-40 mm
NUCLEUS: Indented
Nucleoli: Variable
Chromatin: Condensed
CYTOPLASM: Basophilic
Granules: Present
N/C RATIO: 1:2
REFERENCE INTERVAL:
Bone Marrow: 25% of megakaryocyte precursors in
bone marrow
Peripheral Blood: 0%
