Lymphocytosis

Definition

Lymphocytosis is an increase in the number of lymphocytes in the blood, typically seen during infections or autoimmune disorders. It indicates an immune response to various stimuli.

5 Must Know Facts For Your Next Test

1. Lymphocytosis can be classified as either relative or absolute based on lymphocyte counts and proportions.
2. Common causes include viral infections, chronic inflammatory conditions, and certain autoimmune diseases such as rheumatoid arthritis.
3. In autoimmune disorders, lymphocytosis may signify an overactive immune response attacking the body's own tissues.
4. Diagnosis often involves blood tests showing elevated lymphocyte counts along with other diagnostic criteria depending on the underlying condition.
5. Treatment of lymphocytosis focuses on addressing the underlying cause rather than the elevated lymphocyte count itself.

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Related terms

Autoimmunity: The immune system's reaction against the body's own cells and tissues.

Leukocytosis: An increase in the total number of white blood cells in the blood.

Rheumatoid Arthritis:

A chronic autoimmune disorder that primarily affects joints, leading to inflammation and pain.