Bone Marrow

Normal Bone Marrow Cells

  • A normal bone marrow smear stained with Wright/Giemsa stain is captured in this photograph.
  • Note the normal maturation sequence beginning with myelocytes (the two large cells in the left upper corner)through metamyelocytes, band neutrophils,and multi-lobed segmented neutrophils.
  • The small cells with darkly staining, centrally placed nuclei are normoblasts (three are clustered in the left lower field).
  • Absent in this field are eosinophils, basophils and megakaryocytes.
  • A normal M:E ratio of 2.4:1 is calculated from the twelve myeloid cells and five normoblasts. Two lymphocytes are identified, one left center, the other left upper.

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