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Prenatal diagnosis of syndromes associating albinism and immune deficiencies (Chediak‐Higashi syndrome and variant)

We have successfully undertaken the prenatal diagnosis of two hereditary syndromes associating albinism and immune defects. Because the genes responsible for these diseases have not yet been mapped and the immune abnormalities are too subtle to be diagnosed in utero, the prenatal diagnosis was made using a morphological approach. In the case of Chediak‐Higashi syndrome, it was based on light microscopic examination of the hair shaft and on light and electron microscopic study of polymorphonuclear cells. In the syndrome associating immune deficiency and partial albinism, the Griscelli syndrome, only examination of the hair was feasible. The diagnosis was negative in 12 fetuses at risk and positive in four.