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Microcytosis or microcythemia [1] is a condition in which red blood cells are unusually small as measured by their mean corpuscular volume. [ 2 ] When associated with anemia , it is known as microcytic anemia .
The normal mean corpuscular volume (abbreviated to MCV on full blood count results, and also known as mean cell volume) is approximately 80–100 fL. When the MCV is <80 fL, the red cells are described as microcytic and when >100 fL, macrocytic (the latter occurs in macrocytic anemia). The MCV is the average red blood cell size.
A blood smear showing hypochromic (and microcytic) anemia.Note the increased central pallor of the red blood cells. Hypochromic anemia is a generic term for any type of anemia in which the red blood cells are paler than normal.
Pinocytosis, also known as cell drinking, is the absorption of small aqueous particles along with the membrane receptors that recognize them.It is an example of fluid phase endocytosis and is usually a continuous process within the cell.
In the case of iron deficiency anemia, microcytosis and hypochromia would also be expected. [3] Causes. Rare elliptocytes (less than 1%) ...
If he has microcytosis (mean cell hemoglobin < 27 pg or mean red cell volume < 80 fl), the woman is tested. When both are microcytic, their hemoglobin A2 concentrations are measured. If both have a concentration above 3.5% (diagnostic of thalassemia trait) they are referred to the local designated health post for genetic counseling .
Scanning electron microscopy (SEM) of echinocytes Echinocyte compared to other forms of poikilocytosis. Echinocyte (from the Greek word echinos, meaning 'hedgehog' or 'sea urchin'), in human biology and medicine, refers to a form of red blood cell that has an abnormal cell membrane characterized by many small, evenly spaced thorny projections.
Polychromasia is a disorder where there is an abnormally high number of immature red blood cells found in the bloodstream as a result of being prematurely released from the bone marrow during blood formation (poly- refers to many, and -chromasia means color.)