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CHAPTER 3  ERYTHROCYTE MATURATION  29

                                         POLYCHROMATIC ERYTHROCYTE
                                           Diffusely Basophilic Erythrocyte
                                                   Reticulocyte























                  A                                          B
               FIGURE 3–10A  Polychromatic erythrocyte.    FIGURE 3–10B  Scanning electron micrograph
               Sometimes appears “lumpy.” Slight gray-blue   of polychromatic erythrocyte (35000). Note that
               color persists while the cell attains full    the reticulocyte is a very deformable cell, giving
               hemoglobinization.                          it a “lumpy” appearance by scanning electron
                                                           microscopy.
               SIZE:  8-8.5 mm
               NUCLEUS:  Absent
               Nucleoli:  NA
               Chromatin:  NA
               CYTOPLASM:  Color is slightly more blue/purple
                  than the mature erythrocyte
               N/C RATIO:  NA
               REFERENCE INTERVAL:
               Bone Marrow:  1%
               Peripheral Blood:  0.5% to 2.0%
               NOTE:  When stained with supravital stain (e.g., new
                  methylene blue), polychromatic erythrocytes
                  appear as reticulocytes (contain precipitated
                  ribosomal material; see Figure 12-5A).
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