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. 2019;13(5-6):271-277.
doi: 10.1159/000510532. Epub 2020 Sep 19.

Various Genital and Reproductive Phenotypes in 46,XX/46,XY Chimeras

Agathe Hercent, Edouard Amar, Alexander Valent, Stéphanie Belloc, Xavier Ferraretto, Jean-François Hermieu, Régine Battin-Bertho, Caroline Storey, Isabelle Goubin-Versini, Frédérique Dijoud, Anne C Tabet, Sandra Chantot-Bastaraud, Matthieu Peycelon, Hélène Morel, Jean-Pierre Siffroi

Various Genital and Reproductive Phenotypes in 46,XX/46,XY Chimeras

Agathe Hercent et al. Sex Dev. 2019.

Abstract

Tetragametic chimeras are due to the fusion of 2 different zygotes after fertilization. When occurring between embryos of different chromosomal sex, the phenotype ranges from fertile individuals to infertile patients and even to patients with variations in sex development. Here, we report 3 new cases of XX/XY chimeras, one in a young boy carrying an abnormal gonad which turned out to be an ovary and 2 in phenotypically normal infertile men, one of whom had been diagnosed previously as a XX-SRY negative male. These cases highlight the importance of combining several cytogenetic and molecular techniques on different tissues for a proper diagnosis and an appropriate prognosis.

Keywords: Human chimeras; Male infertility; Ovotestis; Sex development; XX testicular DSD.

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