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WikiDoc Resources for Neutrophilia


Most recent articles on Neutrophilia

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Articles on Neutrophilia in N Eng J Med, Lancet, BMJ


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Risk calculators and risk factors for Neutrophilia

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Symptoms of Neutrophilia

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List of terms related to Neutrophilia

Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]


Neutrophilia (also called neutrophil leukocytosis or occasionally neutrocytosis) is leukocytosis of neutrophils, that is, a high number of neutrophil granulocytes in the blood.[1]

A "left shift" refers to the presence of increased proportions of younger, less well differentiated neutrophils and neutrophil-precursor cells in the blood. This generally reflects early or premature release of myeloid cells from the bone marrow, the site where neutrophils are generated. A severe neutrophilia with left shift is referred to as a leukemoid reaction. The leukocyte alkaline phosphatase (LAP) score, which refers to the amount of alkaline phosphatase per neutrophil, will increase. In a severe infection, toxic granulation changes happen to the neutrophils.

This can resemble Pelger-Huet anomaly.[2][3]

Historical Perspective




Neutrophil are the primary white blood cells that respond to a bacterial infection, so the most common cause of neutrophilia is a bacterial infection, especially pyogenic infections.[4]

Neutrophils are also increased in any acute inflammation, so will be raised after a heart attack,[4] other infarct or burns.[4]

Some drugs, such as prednisone, have the same effect as cortisol and adrenaline (epinephrine), causing marginated neutrophils to enter the blood stream. Nervousness will very slightly raise the neutrophil count because of this effect.

A neutrophilia might also be the result of a malignancy. Chronic myelogenous leukemia (CML or chronic myeloid leukaemia) is a disease where the blood cells proliferate out of control. These cells may be neutrophils. Neutrophilia can also be caused by appendicitis and splenectomy.[5]

Primary neutrophilia can additionally be a result of Leukocyte adhesion deficiency.[6]

Differentiating Neutrophilia from Other Diseases

Epidemiology and Demographics

Risk Factors


Natural History, Complications, and Prognosis

Natural History




Diagnostic Criteria

History and Symptoms

Physical Examination

Laboratory Findings

Imaging Findings

Other Diagnostic Studies


Medical Therapy



See also


  1. Template:DorlandsDict
  2. Mohamed IS, Wynn RJ, Cominsky K, et al. (June 2006). "White blood cell left shift in a neonate: a case of mistaken identity". J Perinatol. 26 (6): 378–80. doi:10.1038/ PMID 16724080.
  3. Shmuely H, Pitlik SD, Inbal A, Rosenfeld JB (June 1993). "Pelger-Huët anomaly mimicking 'shift to the left'". Neth J Med. 42 (5–6): 168–70. PMID 8377874.
  4. 4.0 4.1 4.2 Table 12-6 in: Mitchell, Richard Sheppard; Kumar, Vinay; Abbas, Abul K; Fausto, Nelson. Robbins Basic Pathology. Philadelphia: Saunders. ISBN 1-4160-2973-7. 8th edition.
  5. "bloodandcancerclinic". Retrieved 10 April 2013.