DUPLICATION OF THE SOX3 GENE IN AN SRY-NEGATIVE 46,XX MALE WITH ASSOCIATED CONGENITAL ANOMALIES OF KIDNEYS AND THE URINARY TRACT: CASE REPORT AND REVIEW OF THE LITERATURE
Tasic V1, Mitrotti A2, Riepe FG3, Kulle AE3, Laban N1, Polenakovic M4, Plaseska-Karanfilska D4, Sanna-Cherchi S2, Kostovski M1, Gucev Z1,*
*Corresponding Author: Professor Dr. Zoran Gucev, University Children’s Hospital, Medical Faculty Skopje, ul. Majka Tereza 17, 1000 Skopje, Republic of Macedonia. Mobile: +389-70-279-742. E-mail: gucevz@ gmail.com
page: 81
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Abstract

Disorders of sex development (DSD) are a group of rare conditions characterized by discrepancy between chromosomal sex, gonads and external genitalia. Congenital abnormalities of the kidney and urinary tract are often associated with DSD, mostly in multiple malformation syndromes. We describe the case of an 11-year-old Caucasian boy, with right kidney hypoplasia and hypospadias. Genome-wide copy number variation (CNV) analysis revealed a unique duplication of about 550 kb on chromosome Xq27, and a 46,XX karyotype, consistent with a sex reversal phenotype. This region includes multiple genes, and, among these, SOX3 emerged as the main phenotypic driver. This is the fifth case reporting a genomic imbalance involving the SOX3 gene in a 46,XX SRY-negative male, and the first with associated renal malformations. Our data provide plausible links between SOX3 gene dosage and kidney malformations. It is noteworthy that the current and reported SOX3 gene duplications are below the detection threshold of standard karyotypes and were found only by analyzing CNVs using DNA microarrays. Therefore, all 46,XX SRY-negative males should be screened for SOX3 gene duplications with DNA microarrays.



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