Complete blood count - series

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Results: Normal values vary with altitude and gender.

What abnormal results may mean: Low numbers of red blood cells (hematocrit) may indicate anemia, which has many causes, including:

  • Blood loss
  • Iron deficiencies
  • Deficiencies of vitamin B12 or folic acid
  • Bone marrow failure (for example, from radiation, toxin, fibrosis, tumor)
  • Erythropoietin deficiency (secondary to kidney disease)
  • Hemolysis (RBC destruction)
  • Leukemia
  • Multiple myeloma
  • Over hydration

High numbers of red blood cells may indicate:

  • Fluids
  • Dehydration
  • Burns
  • Eclampsia
  • Erythrocytosis
  • Polycythemia vera

Low numbers of white blood cells (leukopenia) may indicate:

  • Bone marrow failure (for example, due to granuloma, tumor, or fibrosis)
  • Exposure to cytotoxic substance
  • Collagen-vascular diseases (such as lupus erythematosus)
  • Disease of the liver or spleen
  • Radiation exposure

High numbers of white blood cells (leukocytosis) may indicate:

  • Infectious diseases
  • Inflammatory disease (such as rheumatoid arthritis or allergy)
  • Leukemia
  • Severe emotional or physical stress
  • Tissue damage (for example, burns)
  • Certain medicines (such as prednisone and other steroids)

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