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Leukopenia (from Greek λευκός (leukos) 'white' and πενία (penia) 'deficiency') is a decrease in the number of leukocytes (WBC). Found in the blood, they are the white blood cells, and are the body's primary defense against an infection. Thus the condition of leukopenia places individuals at increased risk of infection.
In neutropenia discovered at birth or shortly after birth, a diagnosis of allo-immune neutropenia (from maternal white blood cell antibodies passively transferred to the infant) is more likely. In infants neutropenia is defined by absolute neutrophil counts less than 1000/uL. After the first year of life neutropenia is defined by absolute ...
Aplastic anemia [2] (AA) [3] is a severe hematologic condition in which the body fails to make blood cells in sufficient numbers. Blood cells are produced in the bone marrow by stem cells that reside there. [4] Aplastic anemia causes a deficiency of all blood cell types: red blood cells, white blood cells, and platelets. [5] [6]
Individuals with subleukemic leukemia will likely have normal or low white blood cell counts but high abnormal blood cell counts. [citation needed] White blood cells, or leukocytes, are colorless blood cells that flow through the bloodstream and primarily counteract foreign bodies and diseases. High or low white blood cell counts affect the ...
Problems with blood cell formation result in some combination of low red blood cell, platelet, and white blood cell counts. [3] Some types of MDS cause an increase in the production of immature blood cells (called blasts ), in the bone marrow or blood . [ 3 ]
Rheumatoid arthritis is a condition that cannot be cured but symptoms can be treated using certain medications alone or in conjunction. Due to the increased inflammatory response of the body's immune system, this condition can cause a reduction in red and white blood cells. [8]
An excess of white blood cells is usually due to infection or inflammation. Less commonly, a high white blood cell count could indicate certain blood cancers or bone marrow disorders. The number of leukocytes in the blood is often an indicator of disease, and thus the white blood cell count is an important subset of the complete blood count.
Neutropenia is an abnormally low concentration of neutrophils (a type of white blood cell) in the blood. [4] Neutrophils make up the majority of circulating white blood cells and serve as the primary defense against infections by destroying bacteria, bacterial fragments and immunoglobulin-bound viruses in the blood. [5]