Disease or Syndrome
leukocytosis Audio
leu·ko·cy·to·sis [ loo-koh-sahy-toh-sis ]
Subclass of:
Pathologic Processes; Leukocyte Disorders
Etymology:
Greek leukos = white + kytos = vessel or cell + -osis = condition
As in many other words, -osis has an implication of increase.
Definitions related to leukocytosis:
  • A transient increase in the number of leukocytes in a body fluid.
    NLM Medical Subject Headings
    U.S. National Library of Medicine, 2025
  • An abnormal increase in the number of leukocytes in the blood.
    Human Phenotype Ontology (HPO)
    The Human Phenotype Ontology Project, 2025
  • Transient increase in the number of leukocytes in a body fluid.
    CRISP Thesaurus
    National Institutes of Health, 2006
  • A disorder characterized by laboratory test results that indicate an increased number of white blood cells in the blood.
    Common Terminology Criteria for Adverse Events
    U.S. National Institutes of Health, 2021
  • Leukocytosis refers to an increase in the total number of WBCs due to any cause. From a practical standpoint, leukocytosis is traditionally classified according to the component of white cells that contribute to an increase in the total number of WBCs.
    Medscape
    WebMD, 2025
  • Leukocytosis, abnormally high number of white blood cells (leukocytes) in the blood circulation, defined as more than 10,000 leukocytes per cubic millimetre of blood. Leukocytosis is most commonly the result of infection. It may also occur after strenuous exercise, convulsions (e.g., epilepsy)...
    Encyclopedia Britannica
    Encyclopedia Britannica, Inc., 2025
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