Tags: Disease.
Lymphocytosis is an increase in the number or proportion of lymphocytes in the blood. In absolute lymphocytosis the total lymphocyte count is elevated. In adults absolute lymphocytosis is present when the absolute lymphocyte count is greater than 4000 per microliter 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.
