Diagnostic finding

Leukocytosis

An increase in the number of leukocytes in the circulating blood, typically defined as a white blood cell count above the upper limit of the normal reference range for age and physiological state (adults: >11 × 10⁹/L).

Causes

  • Infectious causes

    • Bacterial infections

    • Viral infections

    • Fungal infections

    • Parasitic infections

  • Inflammatory causes

    • Rheumatoid arthritis

    • Allergic reactions

    • Burns

    • Tissue injury

    • Postoperative inflammation

  • Physiological causes

    • Intense exercise

    • Physical or emotional stress

    • Pregnancy

    • Smoking

  • Medication-related causes

    • Corticosteroids

    • β-agonists

    • Lithium

    • Colony-stimulating factors (G-CSF)

  • Hematologic causes

    • Myeloproliferative neoplasms

    • Leukemia

  • Other causes

    • Trauma

    • Splenectomy

    • Malignancy

    • Chronic inflammatory diseases

    • Severe hemorrhage

Also known as: High white blood cell count, Leucocytosis, Neutrophilia

Referencing diagnoses

Note: Lists existing diagnoses in Diagnotize only.