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La prévalence du syndrome de Klinefelter (SK) est de 1/600 hommes et celle du syndrome de Turner (ST) est de 1/2500 femmes. Ces 2 affections génétiques sont liées à des anomalies du chromosome X avec un X supplémentaire dans le SK chez l’homme (47XXY) et la perte d’un X dans le ST chez la fille (45 X). Leur principale caractéristique commune est la dysgénésie gonadique : ce sont là les 2 causes génétiques...
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