leukocytosis

An abnormally large number of leukocytes, as observed in acute infections, inflammation, hemorrhage, and other conditions. A white blood cell count of 10,000 or more per mm3 usually indicates l. Most examples of l. represent a disproportionate increase in the number of cells in the neutrophilic series, and the term is frequently used synonymously with the designation neutrophilia. L. of 15,000–25,000/mm3 is frequently observed in various pathologic conditions, and values as high as 40,000 are not unusual; occasionally, as in some examples of leukemoid reaction s, white blood cell counts may range up to 100,000/mm3. [leukocyte + G. -osis, condition]
- absolute l. an actual increase in the total number of leukocytes in the circulating blood, as distinguished from a relative increase (such as that observed in dehydration).
- agonal l. SYN: terminal l..
- basophilic l. the presence of an abnormally large number of basophilic granulocytes in the blood. SYN: basocytosis.
- digestive l. l. occurring normally after ingestion of food.
- distribution l. an abnormally large proportion of one or more types of leukocytes.
- emotional l. an abnormally high white blood cell count that is thought to be related only to an emotional disturbance.
- eosinophilic l. a form of relative l. in which the greatest proportionate increase is in the eosinophils. SYN: eosinophilia.
- monocytic l. SYN: monocytosis.
- l. of the newborn an apparently “physiologic” l. usually observed in newborn infants, in whom the white blood cell counts are usually greater than 10,000/mm3, and sometimes range to 45,000/mm3, resulting chiefly from increased numbers of neutrophils (especially single and bilobed forms). On the third or fourth day of life, the count generally decreases rapidly, and then fluctuates for several days; beginning about the fourth week of life, a relative lymphocytosis is observed, and this normally continues for a few years.
- physiologic l. any form of l. that is associated with apparently normal situations and that is not directly related to a pathologic condition; e.g., the temporary increase in the total number of white blood cells that may occur during a single day, or from day to day, as well as in the newborn period, during childhood, after strenuous exercise, during attacks of paroxysmal tachycardia, and in association with various other situations.
- relative l. an increased proportion of one or more types of leukocytes in the circulating blood, without an actual increase in the total number of white blood cells.
- terminal l. one that occurs in a person just prior to death, especially in one who has a “slow death.” SYN: agonal l..

* * *

leu·ko·cy·to·sis or chiefly Brit leu·co·cy·to·sis .lü-kə-sī-'tō-səs, -kə-sə- n, pl -to·ses -.sēz an increase in the number of white blood cells in the circulating blood that occurs normally (as after meals) or abnormally (as in some infections)
leu·ko·cy·tot·ic or chiefly Brit leu·co·cy·tot·ic -'tät-ik adj

* * *

leu·ko·cy·to·sis (loo″ko-si-toґsis) a transient increase in the number of leukocytes in the blood; seen normally with strenuous exercise and pathologically accompanying hemorrhage, fever, infection, or inflammation. Cf. hyperleukocytosis.

Medical dictionary. 2011.

Look at other dictionaries:

  • leukocytosis — [lo͞o΄kōsī tō′sis, lo͞o΄kəsī tō′sis] n. [ModL < LEUKOCYTE + OSIS] an increase in the number of leukocytes in the blood: it is a normal response to pregnancy and is found in certain intoxications and in many infections and cases of inflammation …   English World dictionary

  • Leukocytosis — DiseaseDisorder infobox Name = Leukocytosis ICD10 = ICD10|D|72|8|d|70 ICD9 = ICD9|288.3, ICD9|288.6x Caption = ICDO = OMIM = DiseasesDB = 33024 MedlinePlus = eMedicineSubj = eMedicineTopic = MeshID = D007964 Leukocytosis is a raised white blood… …   Wikipedia

  • leukocytosis — leukocytotic /looh koh suy tot ik/, adj. /looh koh suy toh sis/, n. Physiol., Pathol. an increase in the number of white blood cells in the blood. Also, leucocytosis. [1865 70; < NL; see LEUKOCYTE, OSIS] * * * ▪ medical disorder       abnormally… …   Universalium

  • leukocytosis — noun Etymology: New Latin Date: 1866 an increase in the number of white blood cells in the circulating blood …   New Collegiate Dictionary

  • leukocytosis — n. increase in the number of white blood cells in the blood (also leucocytosis) …   English contemporary dictionary

  • leukocytosis — leu·ko·cy·to·sis …   English syllables

  • leukocytosis — leu•ko•cy•to•sis or leu•co•cy•to•sis [[t]ˌlu koʊ saɪˈtoʊ sɪs[/t]] n. pat phl an increase in the number of white blood cells in the blood • Etymology: 1865–70 …   From formal English to slang

  • leukocytosis — /ˌlukoʊsaɪˈtoʊsəs/ (say .loohkohsuy tohsuhs) noun the presence of an increased number of leukocytes in the blood, especially when temporary, as in infection, and not due to leukaemia. Also, leucocytosis. {New Latin. See leukocyte, osis}… …   Australian English dictionary

  • leukocytosis —    Having abnormally high numbers of white blood cells, usually the result of a non viral infection …   Herbal-medical glossary

  • leukocytosis — noun an abnormal increase in the number of white blood cells in the blood as a result of infection (as in leukemia) • Syn: ↑leucocytosis • Hypernyms: ↑blood disease, ↑blood disorder …   Useful english dictionary

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”

We are using cookies for the best presentation of our site. Continuing to use this site, you agree with this.