Page 41 - Clinical Hematology Atlas
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CHAPTER 3  ERYTHROCYTE MATURATION   25

                                         POLYCHROMATIC NORMOBLAST
                                             Polychromatic Erythroblast
                                                     Rubricyte





                                                                                      Cytoplasm



                                                                                      Nucleus

                                                               B
                                                           FIGURE 3–6B  Schematic of polychromatic
                                                           normoblast.

                       A
               FIGURE 3–6A  Polychromatic normoblast. The
               blue color of the cytoplasm is becoming gray-
               blue as hemoglobin is produced.



               SIZE:  10-12 mm
               NUCLEUS:  Round
               Nucleoli:  None
               Chromatin:  Quite condensed
               CYTOPLASM:  Gray-blue as a result of hemoglo-
                  binization
               N/C RATIO:  4:1
               REFERENCE INTERVAL:
               Bone Marrow:  10% to 20%
               Peripheral Blood:  0%







                                                             C
                                                           FIGURE 3–6C  Electron micrograph of polychro-
                                                           matic normoblast (315,575).
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