Skip to content
EntityQ612345· pop 18· linked from 118 articles

lymphocytosis

Sign in to save

Lymphocytosis is an increase in the number or proportion of lymphocytes in the blood. Absolute lymphocytosis is the condition where there is an increase in the lymphocyte count beyond the normal range while relative lymphocytosis refers to the condition where the proportion of lymphocytes relative to white blood cell count is above the normal range. In adults, absolute lymphocytosis is present when the lymphocyte count is greater than 5000 per microliter (5.0 billion/L), in older children greater than 7000 per microliter and in infants greater than 9000 per microliter. Lymphocytes normally rep

Key facts

Medical condition (new).name
Lymphocytosis
Medical condition (new).image
Lymphocytosis.JPG
Medical condition (new).caption
Lymphocytosis, peripheral blood smear (40x)

via Wikipedia infobox

Research

7,297 papers

via PubMed

Wikidata facts

Subclass of
leukocytosis
Image
Lymphocytosis.JPG
Show 4 more facts
health specialty
hematology
Commons category
Lymphocytosis
NCI Thesaurus ID
C34791
Sources (3)

via Wikidata · CC0

~2 min read

Encyclopedic overview

5 sections
Contents
  • Causes
  • Diagnosis
  • See also
  • References
  • External links

Lymphocytosis is an increase in the number or proportion of lymphocytes in the blood. Absolute lymphocytosis is the condition where there is an increase in the lymphocyte count beyond the normal range while relative lymphocytosis refers to the condition where the proportion of lymphocytes relative to white blood cell count is above the normal range. In adults, absolute lymphocytosis is present when the lymphocyte count is greater than 5000 per microliter (5.0 billion/L), in older children greater than 7000 per microliter and in infants greater than 9000 per microliter. Lymphocytes normally represent 20% to 40% of circulating white blood cells. When the percentage of lymphocytes exceeds 40%, it is recognized as relative lymphocytosis.

==Causes==

Excerpted from Wikipedia’s “lymphocytosis” article, available under the CC BY-SA 4.0 licence.