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Leukopenia. 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.
Neutropenia. 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]
Specialty. Infectious disease, pathology. Leukocytosis is a condition in which the white cell (leukocyte) count is above the normal range in the blood. [1][2] It is frequently a sign of an inflammatory response, [3] most commonly the result of infection, but may also occur following certain parasitic infections or bone tumors as well as leukemia.
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.
The white blood cell differential is a common blood test that is often ordered alongside a complete blood count.The test may be performed as part of a routine medical examination; to investigate certain symptoms, particularly those suggestive of infection or hematological disorders; [5] [6] or to monitor existing conditions, such as blood disorders and inflammatory diseases.
Agranulocytosis. Agranulocytosis, also known as agranulosis or granulopenia, is an acute condition involving a severe and dangerous lowered white blood cell count (leukopenia, most commonly of neutrophils) and thus causing neutropenia in the circulating blood. [1] It is a severe lack of one major class of infection-fighting white blood cells.
Symptomatic Hyperleukocytosis (Leukostasis) is defined by a tremendously high blast cell count along with symptoms of decreased tissue perfusion. Leukostasis is associated with people who have bone and blood disorders and is very common among people with acute myeloid leukemia or chronic myeloid leukemia. Leukostasis is a pathologic diagnosis ...
Toxic vacuolization. A vacuolated neutrophil. Specialty. Hematology. Causes. Sepsis, bacterial infection, alcohol toxicity, liver failure, G-CSF treatment. Toxic vacuolation, also known as toxic vacuolization, [1] is the formation of vacuoles in the cytoplasm of neutrophils in response to severe infections or inflammatory conditions. [2][3]