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Updated: Jun 20, 2026

Exploring X Chromosomal Aberrations in Ovarian Cells by Using Fluorescence In Situ Hybridization
Published on: April 7, 2023
Hidden X chromosomal mosaicism in a 46,XX male
V B Chernykh1, L F Kurilo, N V Shilova
1Research Centre for Medical Genetics, Russian Academy of Medical Sciences, Moscow, Russian Federation. chernykh@med-gen.ru
Abstract:
We report on a 37-year-old XX male with complex hidden X chromosomal mosaicism. The patient had fully mature male genitalia with hypoplastic testes descended in the scrotum and no sign of undervirilization. Hormonal examination demonstrated hypergonadotropic hypogonadism, semen analysis showed severe oligoasthenoteratozoospermia. In situ hybridization revealed the presence of 3 SRY-positive cell lines bearing 1, 2 or 3 X chromosomes. Skewed inactivation of the paternal SRY-bearing X chromosome was detected by molecular analysis of the androgen receptor gene.
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