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Macrocytosis is a condition where red blood cells are larger than normal. [1] These enlarged cells, also known as macrocytes, are defined by a mean corpuscular volume (MCV) that exceeds the upper reference range established by the laboratory and hematology analyzer (usually >110 fL). [2] Upon examination of a peripheral blood smear under ...
Macrocytic anemia is not a disease in the sense of having a single pathology but, rather, is a condition. As such, it is the class name for a set of pathologies that all produce somewhat the same red blood cell abnormality. Different pathologies result in macrocytic-type anemias.
Megaloblastic anemia is a type of macrocytic anemia. An anemia is a red blood cell defect that can lead to an undersupply of oxygen. [1] Megaloblastic anemia results from inhibition of DNA synthesis during red blood cell production. [2] When DNA synthesis is impaired, the cell cycle cannot progress from the G2 growth stage to the mitosis (M) stage.
Alcoholism commonly causes a macrocytosis, although not specifically anemia. Other types of liver disease can also cause macrocytosis. Drugs such as methotrexate, zidovudine, and other substances may inhibit DNA replication such as heavy metals; Macrocytic anemia can be further divided into "megaloblastic anemia" or "nonmegaloblastic macrocytic ...
Nucleated red blood cell. A human peripheral blood smear; NRBCs are visible as larger cells with dark centers. A nucleated red blood cell (NRBC), also known by several other names, is a red blood cell that contains a cell nucleus. Almost all vertebrate organisms have hemoglobin -containing cells in their blood, and with the exception of mammals ...
Pernicious anemia was a fatal disease before about the year 1920; until the importance of the liver in hematopoiesis was recognized, the treatment of pernicious anemia was unsuccessful and arbitrary. It may have motivated George Whipple, who had a keen interest in liver diseases, to investigate the liver's role in hematopoiesis. Whipple began ...
Diamond–Blackfan anemia (DBA) is a congenital erythroid aplasia that usually presents in infancy. [3] DBA causes low red blood cell counts (anemia), without substantially affecting the other blood components (the platelets and the white blood cells), which are usually normal. This is in contrast to Shwachman–Bodian–Diamond syndrome, in ...
Mastocytosis, a type of mast cell disease, is a rare disorder affecting both children and adults caused by the accumulation of functionally defective mast cells (also called mastocytes) and CD34 + mast cell precursors. [1]