W4 Flashcards
ERYTHROPOIESIS
The developmental pathway consists of three phases
Ribosome synthesis in early erythroblasts
1st
ERYTHROPOIESIS
The developmental pathway consists of three phases
Hemoglobin accumulation in late erythroblasts and normoblasts
2nd
ERYTHROPOIESIS
The developmental pathway consists of three phases
Ejection of the nucleus from normoblasts and formation of
reticulocytes
3rd
ERYTHROCYTE NORMAL MATURATION SERIES
Size: 12-25 um in diameter
Cytoplasm:
Deeply basophilic
Perinuclear halo
Nucleus: 1-3 nucleoli
Pronormoblast /(Rubriblast)/ (Proerythroblast)
ERYTHROCYTE NORMAL MATURATION SERIES
N/C ratio: 8:1
1% of nucleated cells in bone marrow
Pronormoblast /(Rubriblast)/ (Proerythroblast)
ERYTHROCYTE NORMAL MATURATION SERIES
Size: 12-17 um in diameter
Cytoplasm: intensely basophilic
Nucleus: 75% of the cell
Basophilic Normoblast/(Prorubricyte)/ (Basophilic Erythroblast)
ERYTHROCYTE NORMAL MATURATION SERIES
N/C ratio:
1-3% of nucleated cells of bone marrow
Basophilic Normoblast/(Prorubricyte)/ (Basophilic Erythroblast)
ERYTHROCYTE NORMAL MATURATION SERIES
Size: 12-15 um in diameter
Cytoplasm: blue-gray to pink gray (production of hemoglobin)
Nucleus: Smaller
Polychromatophilic Normoblast/ (Rubricyte)/ (Polychromatophilic Erythroblast)
ERYTHROCYTE NORMAL MATURATION SERIES
N/C ratio:
13-30% of nucleated cells in bone marrow
Polychromatophilic Normoblast/ (Rubricyte)/ (Polychromatophilic Erythroblast)
ERYTHROCYTE NORMAL MATURATION SERIES
This is the last cell division during maturation
Polychromatophilic Normoblast/ (Rubricyte)/ (Polychromatophilic Erythroblast)
ERYTHROCYTE NORMAL MATURATION SERIES
Size: 8-12 um in diameter
Cytoplasm: pinker, increased amount of Hb
Nucleus:
− Pyknotic
− Eccentric
Orthochromic Normoblast/ (Metarubricyte)/ (Orthochromic Erythroblast)
ERYTHROCYTE NORMAL MATURATION SERIES
1-4% of nucleated cell in bone marrow
Orthochromic Normoblast/ (Metarubricyte)/ (Orthochromic Erythroblast)
ERYTHROCYTE NORMAL MATURATION SERIES
Nucleus is extruded at this stage
Orthochromic Normoblast/ (Metarubricyte)/ (Orthochromic Erythroblast)
ERYTHROCYTE NORMAL MATURATION SERIES
Size: 7-10 mm in diameter
Cytoplasm:
− Pink to pinkish gray
− Still contains small amounts of RNA (polychromasia)
Nucleus: none
Reticulocyte
Diffusely Basophilic Erythrocyte
Polychromatophilic Erythrocyte
ERYTHROCYTE NORMAL MATURATION SERIES
Within 24-48 hrs, the cell loses the organelles &
assumes a biconcave shape
Reticulocyte
Diffusely Basophilic Erythrocyte
Polychromatophilic Erythrocyte
ERYTHROCYTE NORMAL MATURATION SERIES
Size: approximately 7.2 um in
diameter
Cytoplasm: Pink
Nucleus: none
Erythrocyte
ERYTHROCYTE NORMAL MATURATION SERIES
RUBRI
Rubriblast
Prorubricyte
Rubricyte
Metarubricyte
Reticulocyte
Mature Eryhtrocyte
ERYTHROCYTE NORMAL MATURATION SERIES
NORMOBLAST
Pronormoblast
Basophilic normoblast Polychromatophilic normoblast
Orthochromic normoblast Reticulocyte
Mature erythrocyte
ERYTHROCYTE NORMAL MATURATION SERIES
ERYTHROBLAST
Proerythroblast
Basophilic erythroblast
Polychromatophilic erythroblast
Ortochromic erythroblast
Reticulocyte
Mature erythrocyte
is stimulated by interleukins and colony-
stimulating factors (CSFs)
Leukopoiesis
are the most important sources
of cytokines
- MACROPHAGE
- T CELLS
Hemocytoblasts differentiate into myeloid stem cells and
lymphoid stem cells
- stem cells become eosinophilic, basophilic and
neutrophilic myeloblasts or monoblasts
MYELOID
Hemocytoblasts differentiate into myeloid stem cells and
lymphoid stem cells
- stem cells become lymphoblasts
LYMPHOID
- lineage gives rise to granulocytes, and monocytes (and
macrophages), which are not granulocytes.
MYELOID
Not seen in Eosinophil or Basophil lineage, also called
stab form, horse-shoe shape nucleus, up to 3% in
peripheral blood
BAND NEUTROPHIL
LEUKOCYTE NORMAL MATURATION SERIES
SIZE: 15-20UM IN DIAMETER
N/C RATIO: 4:1
NUCLEOLI: 2-5
MYELOBLAST
LEUKOCYTE NORMAL MATURATION SERIES
FIRST RECOGNIZABLE STAGE IN BONE MARROW
MYELOBLAST
CANNOT BE DISTINGUISHED FROM MONOBLAST IN LIGHT MICROSCOPY
MYELOBLAST
HSCs, CMPs, and GMPs are not distinguishable with the light microscope and - staining and may resemble type 1 myeloblast and lymphoblast
ROMANOWSKY
TYPE OF MYELOBLAST
N/C RATIO: 8:1-4:1
NO VISIBLE GRANULES
TYPE 1 MYELOBLAST
TYPE OF MYELOBLAST
DISPERSED AZUROPHILIC GRANULES
TYPE 2 MYELOBLAST
TYPE OF MYELOBLAST
RARE IN BM
SEEN IN AML
TYPE 3 MYELOBLAST
LEUKOCYTE NORMAL MATURATION SERIES
N:C ratio of 3:1 to 2:1
NUCLEOLI: 2-3
PROMYELOCYTE
LEUKOCYTE NORMAL MATURATION SERIES
HAS A PARANUCLEAR HALO OR HOF
PROMYELOCYTE
CRYSTAL PROTEIN THAT IS SEEN ON EOSINOPHIL
CHARCOT LEYDEN
LEUKOCYTE NORMAL MATURATION SERIES
SIZE:12-18 UM IN DIAMETER
NC RATIO: 1:1
MYELOCYTE
LEUKOCYTE NORMAL MATURATION SERIES
LAST STAGE CAPABLE OF MITOSIS
MYELOCYTE
LEUKOCYTE NORMAL MATURATION SERIES
SIZE: 10-15UM IN DIAMETER
NC RATIO: DECREASED
CHROMATIN IS COARSE AND CLUMPED
METAMYELOCYTE/JUVENILE CELLS
LEUKOCYTE NORMAL MATURATION SERIES
INDENTED/KIDNEY/PEANUT SHAPED NUCLEUS
PREDOMINANT CELL IN BM
METAMYELOCYTE/ JUVENILE CELLS
LEUKOCYTE NORMAL MATURATION SERIES
FIRST STAGE FOR THE SYNTHESIS OF TERTIARY/ GELATINASE GRANULES
METAMYELOCYTE/ JUVENILE CELLS