ESPE Abstracts

Background: 46XY DSD with female phenotype is classified as complete gonadal dysgenesis (46XY CGD) if a uterus is present or a disorder of androgen synthesis or action if a uterus is absent. The genetic causes of 46XY CGD are not fully clarified. Less than 15% of the cases were found to carry mutations of the sex determining region Y gene (SRY).Purpose: The description of the rare case of two sisters affected of 46XY CPD and gonadoblastoma with SRY mutat...

Background: Mixed gonadal dysgenesis (MGD) is a disorder of sex development associated with a numerical sex chromosome abnormality. Reported genital phenotypes range from female external genitalia or mild clitoromegaly through all stages of ambiguous genitalia to hypospadias or a normal penis, depending on the proportion of monosomic cells.Case presentation: 18 years old girl, with a history of hypertension, ventricular septal defect and obesity presente...

Background: Isolated gonadal dysgenesis due to NR0B1 locus duplication is a rare cause of 46,XY DSD. Almost reported cases were a total gonadal dysgenesis with complete female phenotype associated with primary amenorrhea. Only two unrelated cases of isolated partial gonadal dysgenesis with molecular characterization have been reported. The risk of gonadoblastoma is high.Objective and hypotheses: Phenotype correlation study (clinical, hormonal, and histol...

Background: Isolated gonadal dysgenesis due to NR0B1 locus duplication is a rare cause of 46,XY DSD. Almost reported cases were a total gonadal dysgenesis with complete female phenotype and streak gonad diagnosed late because of absent of pubertal development and primary amenorrhea. Only two unrelated cases of isolated partial gonadal dysgenesis with molecular characterization have been reported. The risk of gonadoblastoma is high.Family case reports: Al...

Background: The isodicentric Y (idic Y) is one of the most common aberrations of the Y chromosome. Most patients (pts) are chromosomal mosaics, including 45,X cell line.Objective and hypotheses: Our aim is to describe clinical and molecular features of our 45,X/46,Xidic(Y) cases.Method: We retrospectively evaluate the clinical description of nine cases (six females, one male, two with ambiguous genitalia) with mosaic karyotype 45,X...

Background: Mosaic Turner syndrome (TSM) commonly occurs in the form of 45,X/46,XX and 45,X/46,Xiq, although mosaicism including the presence of a Y chromosome has been well documented. It is associated with increased risk of gonadoblastoma (GB).Objective and hypotheses: To date, there are only six reported cases of TSM with a trisomy 18 karyotype, and only two of these were phenotypically female with 45,X, 47,XY+18 karyotype.Metho...

Background: 17α-Hydroxylase/17,20-lyase deficiency is a rare form of congenital adrenal hyperplasia caused by mutations in CYP17A1, characterized by reduction of androgens, estrogens and cortisol production and mineralocorticoid excess.Objective and hypotheses: To describe the clinical and molecular characteristics of two sisters with 17α-hydroxylase/17, 20-lyase deficiency.Method: Two sisters, phenotypic females...

Background: 17-β-hydroxysteroid dehydrogenase 3 (17-β-HSD3) deficiency is a rare disorder of sex development due to impaired conversion of androstenedione to testosterone. Children with 46,XY karyotype often have female appearing external or ambiguous genitalia at birth. At the time of puberty, virilisation can occur. Therefore 46,XY patients with HSD17B3 gene defects should be raised as male.Objective and hypotheses: When a child with 46,XY ka...

Background: Patients with mixed gonadal dysgenesis (MGD), whose prototypical karyotype is 45,X/46,XY may manifest complications characteristic of Turner’s syndrome. We here present a 10-year-old male with MGD who had coarctation of aorta. At birth, he was found to have hypospadias, bifid scrotum and cryptorchidism. Chromosomal analysis of lymphocytes revealed a karyotype of 46,X idic Y (23)/45,X (7). Left gonadectomy was performed in infancy and the removed gonad showed s...

Background: Mutations in the 17β-hydroxysteroid dehydrogenase (17βHSD 3) result in 46,XY disorder of sex development (DSD). Biochemical hallmark of 17βHSD 3 deficiency is a Testosterone/Androstenedione ratio (T/A ratio) <0.8. 17βHSD 3 mutations have been associated with a wide spectrum of phenotypes, ranging from under-virilized male to a female appearance of genitalia at birth. Indeed, 17βHSD 3 deficiency in prepubertal patients is often clinicall...