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  2. Overdominance - Wikipedia

    en.wikipedia.org/wiki/Overdominance

    Sickle cell anemia. An example of overdominance in humans is that of the sickle cell anemia. This condition is determined by a single polymorphism. Possessors of the deleterious allele have lower life expectancy, with homozygotes rarely reaching 50 years of age. However, this allele also yields some resistance to malaria. Thus in regions where ...

  3. Sickle cell retinopathy - Wikipedia

    en.wikipedia.org/wiki/Sickle_cell_retinopathy

    Sickle cell retinopathy. Sickle cell retinopathy can be defined as retinal changes due to blood vessel damage in the eye of a person with a background of sickle cell disease. It can likely progress to loss of vision in late stages due to vitreous hemorrhage or retinal detachment. [1] Sickle cell disease is a structural red blood cell disorder ...

  4. Sickle Cell Disease Association of America - Wikipedia

    en.wikipedia.org/wiki/Sickle_Cell_Disease...

    The Sickle Cell Disease Association of America, Inc. originated in Racine, Wisconsin. Representatives from 15 different community-based sickle cell organizations came together at Wingspread, a community center, as guest of the Johnson Foundation. There was a common belief that there was a need for national attention to sickle cell disease.

  5. Poikilocytosis - Wikipedia

    en.wikipedia.org/wiki/Poikilocytosis

    Poikilocytosis is variation in the shapes of red blood cells. Poikilocytes may be oval, teardrop-shaped, sickle-shaped or irregularly contracted. Normal red blood cells are round, flattened disks that are thinner in the middle than at the edges. A poikilocyte is an abnormally-shaped red blood cell. [1]

  6. Transfusion therapy (Sickle-cell disease) - Wikipedia

    en.wikipedia.org/wiki/Transfusion_therapy...

    Transfusion therapy for sickle-cell disease entails the use of red blood cell transfusions in the management of acute cases of sickle cell disease and as a prophylaxis to prevent complications by decreasing the number of red blood cells (RBC) that can sickle by adding normal red blood cells. [citation needed]

  7. Diamond–Blackfan anemia - Wikipedia

    en.wikipedia.org/wiki/Diamond–Blackfan_anemia

    Hematology. 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 ...

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