Merck Manual

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Red Blood Cell Shapes
HEM_red_blood_cell_shapes
Red Blood Cell Shapes

    Normal red blood cells are flexible and disk-shaped, thicker at the edges than in the middle. In several hereditary disorders, red blood cells become spherical (in hereditary spherocytosis), oval (in hereditary elliptocytosis), or sickle-shaped (in sickle cell disease).

In these topics
Sickle Cell Disease