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Blood, 1 January 2004, Vol. 103, No. 1, pp. 11.
BLOOD WORK Hereditary spherocytosis
This smear is from a patient with hereditary spherocytosis. Note the dense microspherocytes with absent central pallor. Because of an inherited abnormality in structural red cell membrane proteins, the red cell sheds microparticles such that the membrane loses surface area. The result is that the red cell can no longer maintain its biconcave disc shape and becomes more spherocytic, a shape that jeopardizes passage of affected RBCs from the splenic cords into the sinuses.
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