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Infertility in a new 46, XX male with positive SRY confirmed by fluorescence in situ hybridization: a case report.
The 46, XX male syndrome (de la Chapelle syndrome or 46, XX testicular disorder of sex development) is a rare form of sex reversal with complex mechanisms leading to a large spectrum of clinical manifestations ranging from ambiguous genitalia in the newborn to normal male phenotype. Therefore, diagnosis is established either pre- or early postnatal, or in adult life due to male infertility. In some cases, subtle clinical signs during childhood and puberty may be overlooked. A 28-year-old married man presented with azoospermia without erectile dysfunction. Between 9-14 years he was examined for the small testes and under-masculinized external genitalia but the diagnosis was not further clarified. At presentation, hormonal laboratory evaluation revealed hypergonadotropic hypogonadism. Chromosome analysis showed a 46, XX karyotype and translocation of SRY (testis-determining factor) from chromosome Y to chromosome X was identified by fluorescence in situ hybridization (FISH). Despite early subtle clinical signs of abnormal sexual development in this new 46, XX male syndrome, medical investigations were triggered by infertility.
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