Leukocytes is a general term for a group of cells in the blood, including neutrophils, eosinophils, basophils, lymphocytes, etc. The normal range of peripheral blood leukocyte count in adults is (4-10) × 109/L. When the leukocyte count is consistently higher than 10 × 109/L it is considered higher than normal and is called leukocytosis. There are many diseases that can lead to elevated leukocytes, including the following: Acute infections caused by various germs such as pneumonia and appendicitis, serious tissue injuries such as major surgery and myocardial infarction can cause increased neutrophils as well as leukemia, malignancy, and many other causes can lead to abnormal leukocytosis. Various viral infectious diseases such as chickenpox, hepatitis and recovery from certain infectious diseases can lead to an increase in the number of monocytes in patients. In addition, certain allergic diseases such as bronchial asthma, urticaria and parasitic infectious diseases are causes of elevated eosinophils.
As a result, there are various causes of elevated leukocytes. When the laboratory tests indicate that the number of leukocytes is consistently higher than normal, patients should seek timely medical attention, improve systematic and formal examination and laboratory tests, and provide timely and accurate treatment after a clear diagnosis.