淋巴细胞增多症（或者说淋巴细胞计数高），是指被称为淋巴细胞的白细胞数目升高。淋巴细胞有助于战胜疾病，因此感染后观察到短暂增加属正常。
在成人中，一微升血液中明显高于 3000 个淋巴细胞的计数一般视为淋巴细胞增多症。在儿童中，淋巴细胞增多症的阈值随年龄而变化。该阈值可能高达 9000 个淋巴细胞/微升血液。淋巴细胞增多症的确切阈值可能因实验室而略有差异。
July 22, 2021
- Bain BJ, et al., eds. Approach to the diagnosis and classification of blood cell disorders. In: Dacie and Lewis Practical Haematology. 12th ed. London, Eng: Elsevier; 2017. https://www.clinicalkey.com. Accessed June 20, 2019.
- Davids MS. Approach to the adult with lymphocytosis or lymphocytopenia. https://www.uptodate.com/contents/search. Accessed June 20, 2019.
- AskMayoExpert. Lymphocytosis. Rochester, Minn.: Mayo Foundation for Medical Education and Research; 2019.
- Coates TD. Approach to the child with lymphocytosis or lymphocytopenia. https://www.uptodate.com/contents/search. Accessed June 20, 2019.
- Kaushansky K, et al., eds. Lymphocytosis and lymphocytopenia. In: Williams Hematology. 9th ed. New York, N.Y.: McGraw-Hill Education; 2016. https://accessmedicine.mhmedical.com. Accessed June 20, 2019.