title: XX testicular disorder of sex differentiation: case report.
abstract: The 46 XX, testicular sex differentiation disorder, or XX male syndrome, is a rare condition detected by cytogenetics, in which testicular development occurs in the absence of the Y chromosome. It occurs in 1:20,000 to 25,000 male newborns and represents 2% of cases of male infertility. About 90% of individuals present with normal phenotype at birth and are generally diagnosed after puberty for hypoganadism, gynecomastia, and/or infertility. The authors present the report of an XX male with complete masculinization and infertility.
authors.affiliation: Faculdade de Medicina do ABC - FMABC, Santo Andre, SP, BR.
authors.forename: Bianca
authors.initials: B
authors.lastname: Bianco
authors.affiliation: Faculdade de Medicina do ABC - FMABC, Santo Andre, SP, BR.
authors.forename: Denise Maria
authors.initials: DM
authors.lastname: Christofolini
authors.affiliation: Faculdade de Medicina do ABC - FMABC, Santo Andre, SP, BR.
authors.forename: Frederico Rezende
authors.initials: FR
authors.lastname: Ghersel
authors.affiliation: Faculdade de Medicina do ABC - FMABC, Santo Andre, SP, BR.
authors.forename: Marcello Machado
authors.initials: MM
authors.lastname: Gava
authors.affiliation: Faculdade de Medicina do ABC - FMABC, Santo Andre, SP, BR.
authors.forename: Caio Parente
authors.initials: CP
authors.lastname: Barbosa