An absolute monocyte count of 0.63 x 10^9/L is within the normal range, and the normal range of absolute monocyte counts is (0.12 to 0.8) x 10^9/L. Changes in the number of monocytes have both physiologic and pathologic factors. Physiological increase can be seen in infants and children, and pathological increase can be seen in infectious diseases such as typhoid fever, tuberculosis, malaria, and hematological diseases such as monocytic leukemia, lymphoma, and non-Hodgkin’s lymphoma. Monocytes are inherently less abundant in the body, so a decrease in their number has no obvious clinical significance. Monocytes are the largest blood cells in the blood, the cells that make up the highest percentage of the white blood cell classification other than neutrophils and lymphocytes, and one of the most important parts of the body’s defense. Monocytes are differentiated from and develop in bone marrow hematopoietic stem cells, and their function is to phagocytose and remove injured, senescent cells and debris. Monocytes have a powerful deformation ability to recognize and kill tumor cells, participate in the immune response, and are the main defense against intracellular pathogenic bacteria and parasites. If the monocyte laboratory tests appear abnormal, you should consult your doctor in time, and if necessary, you can take further tests to clarify the cause of the disease, so as not to delay the condition.