Thursday, December 3, 2015

Orthochromic Normoblast








Orthochromic Normoblast ( Orthochromic Erythroblast / Metarubricyte )













  • 1 - 4% of nucleated cells in BM
  • Peripheral blood: 0 %
  • Size = 10 -15 μm
  • Low N/C ratio (1:2)
  • Round nucleus
  • No nucleoli
  • Fully condensed chromatin 
  • Cytoplasm: more pink or salmon than blue 


NOTE: The gray-blue color of the cytoplasm is becoming salmon as more hemoglobin is produced. 



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