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The terms hip dysplasia, fibrous dysplasia, renal dysplasia refer to an abnormal development, at macroscopic or microscopical level. Myelodysplastic syndromes, or dysplasia of blood-forming cells, show increased numbers of immature cells in the bone marrow, and a decrease in mature, functional cells in the blood.yelodysplastic syndromes, or dysplasia of blood-forming cells, show increased numbers of immature cells in the bone marrow, and a decrease in mature, functional cells in the blood.
Bone marrow aspirates show predominantly megakaryocytic dysplasia with many small, hypolobated megakaryocytes (see the images below). Small, hypolobated megakaryocytes are typical of myelodysplastic syndrome with isolated del(5q) (bone marrow aspirate, Wright-Giemsa, Ã1000).