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Polychromatic red blood cells appear bluish-gray on the blood smear. 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 .)
Hemolytic anemia or haemolytic anaemia is a form of anemia due to hemolysis, the abnormal breakdown of red blood cells (RBCs), either in the blood vessels (intravascular hemolysis) or elsewhere in the human body (extravascular). [2]
Elevations in target cells are the result of a shift in the exchange equilibrium between the red blood cells and the cholesterol. Also, the surface membrane to volume ratio is increased. Target cells are more resistant to osmotic lysis, which is mostly seen in dogs. Hypochromic cells in iron deficiency anemias also can show a target appearance.
Reticulocytes are also relatively large, a characteristic that is described by the mean corpuscular volume. Supravital stain of a smear of human blood from a patient with hemolytic anemia. The reticulocytes are the cells with the dark blue dots and curved linear structures (reticulum) in the cytoplasm.
Macrocytic anemia is a class of anemia characterized by the presence of predominantly larger-than-normal red blood cells (RBC, also known as erythrocytes) accompanied by low numbers of RBC and often also with insufficient hemoglobin content per cell. Macrocytic anemia occurs when – despite the larger cell size – such factors result in ...
Rouleaux (singular is rouleau) are stacks or aggregations of red blood cells (RBCs) that form because of the unique discoid shape of the cells in vertebrates. The flat surface of the discoid RBCs gives them a large surface area to make contact with and stick to each other; thus forming a rouleau.
According to the FDA "It was known for some time that propylene glycol caused Heinz Body formation in the red blood cells of cats (small clumps of proteins seen in the cells when viewed under the microscope), but it could not be shown to cause overt anemia or other clinical effects.
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. (Hypo- refers to less, and chromic means colour.) A normal red blood cell has a biconcave disk shape and will have an area of pallor in its center when viewed microscopically.