Ovotesticular disorder of sexual development due to gonosomal mosaicism

This paper describes diagnosis and surgical treatment of a 3.5 year-old child who presented with abnormal sex differentiation resulting in the development of gonads into ovotestes. This disorder was provoked by a rare variant of mosaicism involving sex chromosome and characterized by the presence of an irregular marker chromosome. Additional genetic analysis allowed its origin to be determined: it was identified as Yp chromosome. Comprehensive examination yielded criteria for the choice of sexual identity and provided a basis for the surgical treatment in conformity with the gender being sought.

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