[H-Y antigen and sexual dysgenesis in man].

H-Y antigen is a surface component associated with the heterogametic sex of various species and supposed to induce testicular differentiation. Genes controlling directly or not the expression of H-Y antigen and testicular differentiation have been localized on Y as well as on X chromosome and even autosomal chromosome. However the genetical localization of the H-Y structural gene remains unknown. We analysed the expression of H-Y antigen in three types of sexual dysgenesis (males bearing XX caryotype, testicular feminization syndrome and one case of hermaphroditism) to clarify the function and the genetics of this antigen.