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White cell count abnormal

Last reviewed dd mmm yyyy. Last edited dd mmm yyyy

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The leukocytes are blood cells possessing a nucleus.

There are three key types - granulocytes, lymphocytes, monocytes::

  • granulocytes
    • a group of white blood cells defined on the basis of their granular appearance on microscopic examination after application of Romanowsky stains. They are all derived from a promyelocyte precursor within the bone marrow by granulopoiesis. Granulocytes include:
      • neutrophils - polymorphonuclear leukocytes
      • basophils
      • eosinophils

  • lymphocytes

  • monocytes

They are involved in inflammatory and immune responses.

A schemata for managing raised neutrophils, lymphocytes or monocytes in adults is presented (1):


If raised eosinophil count in an adult (1):



  • NHS Camden CCG. Abnormal FBC guidance - for adults (Accessed 30/10/19)

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