Duplication of Chromosome 22q as a Key Event in Hermaphroditism and Hypospadias.

Hermaphroditism can be triggered by 22q11.2 duplication in 46,XX individuals without SRY, indicating alternate routes regulating sexual differentiation. Hypospadias may be exacerbated by gene overexpression in this area, which may interfere with androgen signaling. Furthermore, located on the 22q13.33 and 22q11.2 regions, respectively, PLXNB2 and CRKL may also be involved in urogenital abnormalities, while SOX10 duplications are associated with sex reversal. The way that TBX1 interacts with the SHH pathway points to an additional role in the development of hypospadias. Despite their contributions, genes such as ZNF74 likely have little effect. Although chromosomal microarray analysis (CMA) and fluorescence in situ hybridization (FISH) improve the diagnosis of 22q11.2-associated hermaphroditism, the syndrome's varied expressivity makes clinical evaluation and prediction more difficult. These uncommon rearrangements are caused by nonallelic homologous recombination NAHR between low-copy repeats, which makes diagnosis even more difficult. More study is required to elucidate the underlying mechanisms of these disorders' complicated gene connections and enhance diagnostic precision.