Variants in Two Unrelated Cases with 46, XY Disorder of Sex Development and Review of the Literature.

The genetic cause of 46, XY disorder of sex development (DSD) still cannot be determined in about half of the cases. haploinsufficiency is one of the rare causes of DSD in genetic males (46, XY). Twenty-two cases with 46, XY DSD due to haploinsufficiency (nine missense variant, two copy number variation) have been previously reported. In these cases, the phenotype may range from a mild undervirilization to complete female external genitalia. The haploinsufficiency may be caused by a sequence variant or copy number variation (8p23 deletion). The aim of this study was to present two unrelated patients with DSD due to variants and to review the phenotypic and genotypic characteristics of DSD cases related to deficiency.