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Leukocytosis
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Basics
Description
Leukocytosis refers to a total white blood cell (WBC) count above the normal range for age.
Risk Factors
- Very low-birth-weight neonates
- Immunodeficiencies or immunocompromised states
- Inflammatory disorders
- Autoimmune disorders
Children with trisomy 21 (Down syndrome) have an increased risk of developing transient myeloproliferative disorder (TMD) or leukemoid reactions.
Pathophysiology
Leukocytosis results from increased marrow production, demargination, prolonged cell survival, and/or defective extravasculation in response to external stimuli or, less commonly, from an underlying marrow disorder.
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Basics
Description
Leukocytosis refers to a total white blood cell (WBC) count above the normal range for age.
Risk Factors
- Very low-birth-weight neonates
- Immunodeficiencies or immunocompromised states
- Inflammatory disorders
- Autoimmune disorders
Children with trisomy 21 (Down syndrome) have an increased risk of developing transient myeloproliferative disorder (TMD) or leukemoid reactions.
Pathophysiology
Leukocytosis results from increased marrow production, demargination, prolonged cell survival, and/or defective extravasculation in response to external stimuli or, less commonly, from an underlying marrow disorder.
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